unittests/tests-netreg: fixed header file include guard
unittests/tests-netreg: fixed header file include guard

fixes #2623
adjih/RIOT,rfuentess/RIOT,adjih/RIOT,abkam07/RIOT,latsku/RIOT,ks156/RIOT,DipSwitch/RIOT,malosek/RIOT,miri64/RIOT,Osblouf/RIOT,kYc0o/RIOT,gebart/RIOT,kYc0o/RIOT,wentaoshang/RIOT,gbarnett/RIOT,Osblouf/RIOT,OTAkeys/RIOT,brettswann/RIOT,haoyangyu/RIOT,latsku/RIOT,DipSwitch/RIOT,changbiao/RIOT,binarylemon/RIOT,katezilla/RIOT,kaspar030/RIOT,jfischer-phytec-iot/RIOT,jfischer-phytec-iot/RIOT,automote/RIOT,abkam07/RIOT,benoit-canet/RIOT,A-Paul/RIOT,BytesGalore/RIOT,asanka-code/RIOT,OlegHahm/RIOT,zhuoshuguo/RIOT,sumanpanchal/RIOT,thomaseichinger/RIOT,roberthartung/RIOT,sgso/RIOT,herrfz/RIOT,zhuoshuguo/RIOT,arvindpdmn/RIOT,marcosalm/RIOT,beurdouche/RIOT,miri64/RIOT,beurdouche/RIOT,daniel-k/RIOT,lazytech-org/RIOT,rajma996/RIOT,arvindpdmn/RIOT,aeneby/RIOT,OlegHahm/RIOT,dhruvvyas90/RIOT,MarkXYang/RIOT,thomaseichinger/RIOT,RBartz/RIOT,Hyungsin/RIOT-OS,koenning/RIOT,khhhh/RIOT,rousselk/RIOT,cladmi/RIOT,kb2ma/RIOT,avmelnikoff/RIOT,rousselk/RIOT,fnack/RIOT,watr-li/RIOT,msolters/RIOT,immesys/RiSyn,jferreir/RIOT,tdautc19841202/RIOT,kerneltask/RIOT,PSHIVANI/Riot-Code,mtausig/RIOT,TobiasFredersdorf/RIOT,kaspar030/RIOT,khhhh/RIOT,adrianghc/RIOT,chris-wood/RIOT,d00616/RIOT,alex1818/RIOT,hamilton-mote/RIOT-OS,benoit-canet/RIOT,katezilla/RIOT,gebart/RIOT,RubikonAlpha/RIOT,BytesGalore/RIOT,rakendrathapa/RIOT,backenklee/RIOT,bartfaizoltan/RIOT,FrancescoErmini/RIOT,thomaseichinger/RIOT,herrfz/RIOT-old,OTAkeys/RIOT,plushvoxel/RIOT,zhuoshuguo/RIOT,chris-wood/RIOT,RubikonAlpha/RIOT,wentaoshang/RIOT,koenning/RIOT,sgso/RIOT,benoit-canet/RIOT,josephnoir/RIOT,RubikonAlpha/RIOT,ant9000/RIOT,authmillenon/RIOT,authmillenon/RIOT,stevenj/RIOT,mfrey/RIOT,jferreir/RIOT,herrfz/RIOT-old,dhruvvyas90/RIOT,daniel-k/RIOT,lebrush/RIOT,Yonezawa-T2/RIOT,avmelnikoff/RIOT,asanka-code/RIOT,changbiao/RIOT,zhuoshuguo/RIOT,syin2/RIOT,l3nko/RIOT,lebrush/RIOT,sgso/RIOT,shady33/RIOT,khhhh/RIOT,yogo1212/RIOT,ThanhVic/RIOT,kb2ma/RIOT,LudwigOrtmann/RIOT,avmelnikoff/RIOT,gbarnett/RIOT,biboc/RIOT,ks156/RIOT,adrianghc/RIOT,biboc/RIOT,openkosmosorg/RIOT,patkan/RIOT,backenklee/RIOT,DipSwitch/RIOT,alignan/RIOT,rfuentess/RIOT,kYc0o/RIOT,l3nko/RIOT,phiros/RIOT,Josar/RIOT,herrfz/RIOT,JensErdmann/RIOT,MonsterCode8000/RIOT,josephnoir/RIOT,aeneby/RIOT,mfrey/RIOT,msolters/RIOT,benoit-canet/RIOT,PSHIVANI/Riot-Code,Osblouf/RIOT,authmillenon/RIOT,rakendrathapa/RIOT,kushalsingh007/RIOT,koenning/RIOT,patkan/RIOT,brettswann/RIOT,arvindpdmn/RIOT,openkosmosorg/RIOT,gautric/RIOT,MohmadAyman/RIOT,RubikonAlpha/RIOT,rajma996/RIOT,BytesGalore/RIOT,kaleb-himes/RIOT,josephnoir/RIOT,FrancescoErmini/RIOT,smlng/RIOT,tdautc19841202/RIOT,robixnai/RIOT,Hyungsin/RIOT-OS,jbeyerstedt/RIOT-OTA-update,dailab/RIOT,centurysys/RIOT,phiros/RIOT,MohmadAyman/RIOT,Ell-i/RIOT,latsku/RIOT,arvindpdmn/RIOT,tdautc19841202/RIOT,gbarnett/RIOT,l3nko/RIOT,Josar/RIOT,tdautc19841202/RIOT,stevenj/RIOT,sumanpanchal/RIOT,alex1818/RIOT,phiros/RIOT,OlegHahm/RIOT,PSHIVANI/Riot-Code,mfrey/RIOT,tfar/RIOT,LudwigOrtmann/RIOT,lazytech-org/RIOT,Josar/RIOT,A-Paul/RIOT,zhuoshuguo/RIOT,Lexandro92/RIOT-CoAP,neumodisch/RIOT,herrfz/RIOT-old,adrianghc/RIOT,Osblouf/RIOT,dailab/RIOT,TobiasFredersdorf/RIOT,toonst/RIOT,Yonezawa-T2/RIOT,RBartz/RIOT,RBartz/RIOT,patkan/RIOT,RIOT-OS/RIOT,MonsterCode8000/RIOT,yogo1212/RIOT,gautric/RIOT,rousselk/RIOT,latsku/RIOT,jasonatran/RIOT,PSHIVANI/Riot-Code,lebrush/RIOT,chris-wood/RIOT,tfar/RIOT,tfar/RIOT,bartfaizoltan/RIOT,Yonezawa-T2/RIOT,LudwigKnuepfer/RIOT,MohmadAyman/RIOT,rfswarm/RIOT,gautric/RIOT,brettswann/RIOT,gbarnett/RIOT,d00616/RIOT,rfuentess/RIOT,LudwigKnuepfer/RIOT,abp719/RIOT,kushalsingh007/RIOT,backenklee/RIOT,d00616/RIOT,authmillenon/RIOT,marcosalm/RIOT,EmuxEvans/RIOT,kerneltask/RIOT,luciotorre/RIOT,chris-wood/RIOT,phiros/RIOT,FrancescoErmini/RIOT,kerneltask/RIOT,patkan/RIOT,watr-li/RIOT,MohmadAyman/RIOT,Darredevil/RIOT,miri64/RIOT,jremmert-phytec-iot/RIOT,x3ro/RIOT,robixnai/RIOT,msolters/RIOT,daniel-k/RIOT,abp719/RIOT,MarkXYang/RIOT,yogo1212/RIOT,DipSwitch/RIOT,DipSwitch/RIOT,jbeyerstedt/RIOT-OTA-update,EmuxEvans/RIOT,JensErdmann/RIOT,kaleb-himes/RIOT,Darredevil/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,dhruvvyas90/RIOT,thiagohd/RIOT,centurysys/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,bartfaizoltan/RIOT,sumanpanchal/RIOT,avmelnikoff/RIOT,binarylemon/RIOT,dhruvvyas90/RIOT,LudwigKnuepfer/RIOT,dkm/RIOT,MarkXYang/RIOT,roberthartung/RIOT,Ell-i/RIOT,abp719/RIOT,malosek/RIOT,EmuxEvans/RIOT,adjih/RIOT,syin2/RIOT,A-Paul/RIOT,luciotorre/RIOT,LudwigOrtmann/RIOT,Josar/RIOT,brettswann/RIOT,rfswarm/RIOT,shady33/RIOT,sumanpanchal/RIOT,TobiasFredersdorf/RIOT,l3nko/RIOT,mfrey/RIOT,cladmi/RIOT,kb2ma/RIOT,OTAkeys/RIOT,watr-li/RIOT,aeneby/RIOT,mtausig/RIOT,daniel-k/RIOT,koenning/RIOT,openkosmosorg/RIOT,attdona/RIOT,JensErdmann/RIOT,robixnai/RIOT,ntrtrung/RIOT,ximus/RIOT,alex1818/RIOT,brettswann/RIOT,MonsterCode8000/RIOT,TobiasFredersdorf/RIOT,wentaoshang/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,jfischer-phytec-iot/RIOT,JensErdmann/RIOT,beurdouche/RIOT,jferreir/RIOT,neumodisch/RIOT,malosek/RIOT,fnack/RIOT,daniel-k/RIOT,hamilton-mote/RIOT-OS,syin2/RIOT,tfar/RIOT,kbumsik/RIOT,neumodisch/RIOT,herrfz/RIOT-old,JensErdmann/RIOT,kushalsingh007/RIOT,syin2/RIOT,ntrtrung/RIOT,jremmert-phytec-iot/RIOT,alignan/RIOT,rfswarm/RIOT,smlng/RIOT,hamilton-mote/RIOT-OS,Osblouf/RIOT,immesys/RiSyn,RIOT-OS/RIOT,binarylemon/RIOT,rakendrathapa/RIOT,tfar/RIOT,arvindpdmn/RIOT,sgso/RIOT,bartfaizoltan/RIOT,yogo1212/RIOT,robixnai/RIOT,jasonatran/RIOT,dkm/RIOT,RIOT-OS/RIOT,rakendrathapa/RIOT,alignan/RIOT,openkosmosorg/RIOT,ThanhVic/RIOT,khhhh/RIOT,basilfx/RIOT,yogo1212/RIOT,JensErdmann/RIOT,toonst/RIOT,mtausig/RIOT,abkam07/RIOT,gautric/RIOT,basilfx/RIOT,dailab/RIOT,changbiao/RIOT,RubikonAlpha/RIOT,haoyangyu/RIOT,OlegHahm/RIOT,hamilton-mote/RIOT-OS,chris-wood/RIOT,altairpearl/RIOT,mfrey/RIOT,kbumsik/RIOT,marcosalm/RIOT,benoit-canet/RIOT,kYc0o/RIOT,kYc0o/RIOT,malosek/RIOT,kaspar030/RIOT,attdona/RIOT,adrianghc/RIOT,neiljay/RIOT,luciotorre/RIOT,herrfz/RIOT,TobiasFredersdorf/RIOT,jremmert-phytec-iot/RIOT,dkm/RIOT,Hyungsin/RIOT-OS,d00616/RIOT,thiagohd/RIOT,RBartz/RIOT,altairpearl/RIOT,stevenj/RIOT,roberthartung/RIOT,Darredevil/RIOT,centurysys/RIOT,sgso/RIOT,arvindpdmn/RIOT,herrfz/RIOT,stevenj/RIOT,MarkXYang/RIOT,LudwigOrtmann/RIOT,changbiao/RIOT,abp719/RIOT,ntrtrung/RIOT,DipSwitch/RIOT,neiljay/RIOT,gautric/RIOT,rfswarm/RIOT,centurysys/RIOT,dailab/RIOT,rfuentess/RIOT,Hyungsin/RIOT-OS,daniel-k/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,ant9000/RIOT,rajma996/RIOT,watr-li/RIOT,x3ro/RIOT,ThanhVic/RIOT,wentaoshang/RIOT,ant9000/RIOT,LudwigOrtmann/RIOT,d00616/RIOT,Ell-i/RIOT,patkan/RIOT,jbeyerstedt/RIOT-OTA-update,kbumsik/RIOT,haoyangyu/RIOT,alex1818/RIOT,avmelnikoff/RIOT,kushalsingh007/RIOT,dailab/RIOT,asanka-code/RIOT,thiagohd/RIOT,Lexandro92/RIOT-CoAP,marcosalm/RIOT,fnack/RIOT,MonsterCode8000/RIOT,openkosmosorg/RIOT,shady33/RIOT,neiljay/RIOT,khhhh/RIOT,josephnoir/RIOT,tdautc19841202/RIOT,lazytech-org/RIOT,x3ro/RIOT,attdona/RIOT,PSHIVANI/Riot-Code,immesys/RiSyn,kerneltask/RIOT,x3ro/RIOT,watr-li/RIOT,ant9000/RIOT,gebart/RIOT,sgso/RIOT,rfswarm/RIOT,centurysys/RIOT,automote/RIOT,asanka-code/RIOT,jbeyerstedt/RIOT-OTA-update,mziegert/RIOT,gebart/RIOT,EmuxEvans/RIOT,automote/RIOT,centurysys/RIOT,Yonezawa-T2/RIOT,phiros/RIOT,jbeyerstedt/RIOT-OTA-update,jfischer-phytec-iot/RIOT,watr-li/RIOT,MarkXYang/RIOT,jasonatran/RIOT,plushvoxel/RIOT,cladmi/RIOT,biboc/RIOT,zhuoshuguo/RIOT,katezilla/RIOT,LudwigKnuepfer/RIOT,ant9000/RIOT,RBartz/RIOT,neiljay/RIOT,malosek/RIOT,kbumsik/RIOT,bartfaizoltan/RIOT,automote/RIOT,biboc/RIOT,basilfx/RIOT,immesys/RiSyn,ximus/RIOT,ntrtrung/RIOT,thomaseichinger/RIOT,msolters/RIOT,robixnai/RIOT,brettswann/RIOT,herrfz/RIOT,LudwigKnuepfer/RIOT,abkam07/RIOT,FrancescoErmini/RIOT,katezilla/RIOT,basilfx/RIOT,bartfaizoltan/RIOT,rfswarm/RIOT,Osblouf/RIOT,automote/RIOT,RubikonAlpha/RIOT,koenning/RIOT,MonsterCode8000/RIOT,wentaoshang/RIOT,alignan/RIOT,adjih/RIOT,luciotorre/RIOT,d00616/RIOT,plushvoxel/RIOT,jferreir/RIOT,rousselk/RIOT,BytesGalore/RIOT,EmuxEvans/RIOT,altairpearl/RIOT,josephnoir/RIOT,ThanhVic/RIOT,mtausig/RIOT,cladmi/RIOT,aeneby/RIOT,backenklee/RIOT,Yonezawa-T2/RIOT,cladmi/RIOT,asanka-code/RIOT,Yonezawa-T2/RIOT,luciotorre/RIOT,kaspar030/RIOT,authmillenon/RIOT,asanka-code/RIOT,kushalsingh007/RIOT,miri64/RIOT,stevenj/RIOT,koenning/RIOT,kbumsik/RIOT,phiros/RIOT,smlng/RIOT,rfuentess/RIOT,Darredevil/RIOT,attdona/RIOT,RBartz/RIOT,mziegert/RIOT,syin2/RIOT,kushalsingh007/RIOT,mziegert/RIOT,ks156/RIOT,toonst/RIOT,altairpearl/RIOT,haoyangyu/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,A-Paul/RIOT,robixnai/RIOT,abkam07/RIOT,ks156/RIOT,mziegert/RIOT,rousselk/RIOT,msolters/RIOT,alignan/RIOT,kb2ma/RIOT,openkosmosorg/RIOT,neumodisch/RIOT,MohmadAyman/RIOT,roberthartung/RIOT,roberthartung/RIOT,Darredevil/RIOT,jasonatran/RIOT,biboc/RIOT,Lexandro92/RIOT-CoAP,sumanpanchal/RIOT,lazytech-org/RIOT,MonsterCode8000/RIOT,plushvoxel/RIOT,changbiao/RIOT,kaleb-himes/RIOT,lebrush/RIOT,chris-wood/RIOT,thiagohd/RIOT,malosek/RIOT,ThanhVic/RIOT,jremmert-phytec-iot/RIOT,Hyungsin/RIOT-OS,attdona/RIOT,katezilla/RIOT,OTAkeys/RIOT,mtausig/RIOT,gebart/RIOT,smlng/RIOT,OTAkeys/RIOT,lazytech-org/RIOT,adrianghc/RIOT,EmuxEvans/RIOT,gbarnett/RIOT,FrancescoErmini/RIOT,smlng/RIOT,latsku/RIOT,kaspar030/RIOT,tdautc19841202/RIOT,khhhh/RIOT,RIOT-OS/RIOT,mziegert/RIOT,latsku/RIOT,fnack/RIOT,benoit-canet/RIOT,neumodisch/RIOT,jasonatran/RIOT,lebrush/RIOT,rousselk/RIOT,kerneltask/RIOT,jferreir/RIOT,Ell-i/RIOT,dkm/RIOT,ntrtrung/RIOT,stevenj/RIOT,kaleb-himes/RIOT,marcosalm/RIOT,rajma996/RIOT,l3nko/RIOT,beurdouche/RIOT,kb2ma/RIOT,changbiao/RIOT,herrfz/RIOT,rajma996/RIOT,thiagohd/RIOT,OlegHahm/RIOT,toonst/RIOT,ximus/RIOT,neumodisch/RIOT,PSHIVANI/Riot-Code,miri64/RIOT,rajma996/RIOT,attdona/RIOT,lebrush/RIOT,alex1818/RIOT,jremmert-phytec-iot/RIOT,abp719/RIOT,haoyangyu/RIOT,patkan/RIOT,jfischer-phytec-iot/RIOT,binarylemon/RIOT,LudwigOrtmann/RIOT,l3nko/RIOT,gbarnett/RIOT,shady33/RIOT,abkam07/RIOT,sumanpanchal/RIOT,altairpearl/RIOT,abp719/RIOT,Lexandro92/RIOT-CoAP,wentaoshang/RIOT,haoyangyu/RIOT,automote/RIOT,BytesGalore/RIOT,dhruvvyas90/RIOT,altairpearl/RIOT,ximus/RIOT,thomaseichinger/RIOT,binarylemon/RIOT,herrfz/RIOT-old,jferreir/RIOT,shady33/RIOT,mziegert/RIOT,Lexandro92/RIOT-CoAP,aeneby/RIOT,immesys/RiSyn,ThanhVic/RIOT,backenklee/RIOT,plushvoxel/RIOT,beurdouche/RIOT,toonst/RIOT,fnack/RIOT,immesys/RiSyn,RIOT-OS/RIOT,alex1818/RIOT,shady33/RIOT,ximus/RIOT,neiljay/RIOT,luciotorre/RIOT,msolters/RIOT,yogo1212/RIOT,Darredevil/RIOT,dkm/RIOT,binarylemon/RIOT,fnack/RIOT,ks156/RIOT,MohmadAyman/RIOT,authmillenon/RIOT,Josar/RIOT,rakendrathapa/RIOT,ntrtrung/RIOT,ximus/RIOT,Ell-i/RIOT,A-Paul/RIOT,kaleb-himes/RIOT,x3ro/RIOT,dhruvvyas90/RIOT,MarkXYang/RIOT,marcosalm/RIOT,Lexandro92/RIOT-CoAP,hamilton-mote/RIOT-OS,jremmert-phytec-iot/RIOT,thiagohd/RIOT,FrancescoErmini/RIOT,adjih/RIOT,basilfx/RIOT,rakendrathapa/RIOT