[JENKINS-21486] Check Jenkins version if the flag is set
[JENKINS-21486] Check Jenkins version if the flag is set

And don't fail if no version can be found.

FarmGeek4Life/jenkins,protazy/jenkins,ikedam/jenkins,varmenise/jenkins,azweb76/jenkins,hplatou/jenkins,dennisjlee/jenkins,jglick/jenkins,ndeloof/jenkins,rsandell/jenkins,lilyJi/jenkins,alvarolobato/jenkins,damianszczepanik/jenkins,wuwen5/jenkins,daniel-beck/jenkins,jpbriend/jenkins,ErikVerheul/jenkins,DanielWeber/jenkins,vjuranek/jenkins,jpbriend/jenkins,olivergondza/jenkins,escoem/jenkins,bkmeneguello/jenkins,jpbriend/jenkins,alvarolobato/jenkins,gusreiber/jenkins,alvarolobato/jenkins,ErikVerheul/jenkins,jenkinsci/jenkins,batmat/jenkins,sathiya-mit/jenkins,aldaris/jenkins,ndeloof/jenkins,DanielWeber/jenkins,evernat/jenkins,FarmGeek4Life/jenkins,evernat/jenkins,escoem/jenkins,Ykus/jenkins,godfath3r/jenkins,FarmGeek4Life/jenkins,escoem/jenkins,bkmeneguello/jenkins,rsandell/jenkins,damianszczepanik/jenkins,Vlatombe/jenkins,kohsuke/hudson,SebastienGllmt/jenkins,SebastienGllmt/jenkins,christ66/jenkins,Vlatombe/jenkins,jenkinsci/jenkins,bpzhang/jenkins,pjanouse/jenkins,FarmGeek4Life/jenkins,kohsuke/hudson,stephenc/jenkins,vjuranek/jenkins,godfath3r/jenkins,jpbriend/jenkins,batmat/jenkins,ndeloof/jenkins,oleg-nenashev/jenkins,ydubreuil/jenkins,rlugojr/jenkins,oleg-nenashev/jenkins,jpbriend/jenkins,ErikVerheul/jenkins,tangkun75/jenkins,FarmGeek4Life/jenkins,jpbriend/jenkins,daniel-beck/jenkins,stephenc/jenkins,daniel-beck/jenkins,gitaccountforprashant/gittest,daniel-beck/jenkins,pjanouse/jenkins,rsandell/jenkins,dennisjlee/jenkins,MarkEWaite/jenkins,Jimilian/jenkins,tangkun75/jenkins,v1v/jenkins,NehemiahMi/jenkins,v1v/jenkins,godfath3r/jenkins,pjanouse/jenkins,rlugojr/jenkins,lilyJi/jenkins,protazy/jenkins,samatdav/jenkins,wuwen5/jenkins,v1v/jenkins,azweb76/jenkins,hplatou/jenkins,aldaris/jenkins,FarmGeek4Life/jenkins,amuniz/jenkins,daniel-beck/jenkins,DanielWeber/jenkins,MarkEWaite/jenkins,ajshastri/jenkins,tfennelly/jenkins,viqueen/jenkins,tfennelly/jenkins,MarkEWaite/jenkins,tangkun75/jenkins,recena/jenkins,MarkEWaite/jenkins,damianszczepanik/jenkins,fbelzunc/jenkins,ydubreuil/jenkins,jglick/jenkins,alvarolobato/jenkins,Vlatombe/jenkins,aldaris/jenkins,viqueen/jenkins,azweb76/jenkins,bpzhang/jenkins,stephenc/jenkins,viqueen/jenkins,dennisjlee/jenkins,oleg-nenashev/jenkins,pjanouse/jenkins,gusreiber/jenkins,aldaris/jenkins,varmenise/jenkins,vjuranek/jenkins,daniel-beck/jenkins,varmenise/jenkins,azweb76/jenkins,dennisjlee/jenkins,patbos/jenkins,samatdav/jenkins,kohsuke/hudson,gitaccountforprashant/gittest,MichaelPranovich/jenkins_sc,christ66/jenkins,Jimilian/jenkins,ikedam/jenkins,hplatou/jenkins,rlugojr/jenkins,rsandell/jenkins,bpzhang/jenkins,Jimilian/jenkins,rlugojr/jenkins,recena/jenkins,bkmeneguello/jenkins,tfennelly/jenkins,v1v/jenkins,sathiya-mit/jenkins,gitaccountforprashant/gittest,amuniz/jenkins,hplatou/jenkins,olivergondza/jenkins,damianszczepanik/jenkins,recena/jenkins,samatdav/jenkins,patbos/jenkins,vjuranek/jenkins,gitaccountforprashant/gittest,jglick/jenkins,tangkun75/jenkins,jglick/jenkins,andresrc/jenkins,kohsuke/hudson,NehemiahMi/jenkins,andresrc/jenkins,Ykus/jenkins,dennisjlee/jenkins,wuwen5/jenkins,stephenc/jenkins,recena/jenkins,lilyJi/jenkins,christ66/jenkins,jenkinsci/jenkins,recena/jenkins,protazy/jenkins,Jochen-A-Fuerbacher/jenkins,ikedam/jenkins,amuniz/jenkins,pjanouse/jenkins,Jochen-A-Fuerbacher/jenkins,recena/jenkins,ndeloof/jenkins,Jimilian/jenkins,dariver/jenkins,v1v/jenkins,kohsuke/hudson,dariver/jenkins,azweb76/jenkins,fbelzunc/jenkins,amuniz/jenkins,amuniz/jenkins,lilyJi/jenkins,batmat/jenkins,protazy/jenkins,gitaccountforprashant/gittest,gusreiber/jenkins,hplatou/jenkins,MichaelPranovich/jenkins_sc,bpzhang/jenkins,bpzhang/jenkins,Jochen-A-Fuerbacher/jenkins,tangkun75/jenkins,patbos/jenkins,MichaelPranovich/jenkins_sc,NehemiahMi/jenkins,aldaris/jenkins,daniel-beck/jenkins,SebastienGllmt/jenkins,MichaelPranovich/jenkins_sc,wuwen5/jenkins,rsandell/jenkins,vjuranek/jenkins,tangkun75/jenkins,lilyJi/jenkins,SebastienGllmt/jenkins,oleg-nenashev/jenkins,MarkEWaite/jenkins,olivergondza/jenkins,damianszczepanik/jenkins,FarmGeek4Life/jenkins,tangkun75/jenkins,NehemiahMi/jenkins,Jimilian/jenkins,ydubreuil/jenkins,tfennelly/jenkins,stephenc/jenkins,escoem/jenkins,alvarolobato/jenkins,christ66/jenkins,gusreiber/jenkins,patbos/jenkins,samatdav/jenkins,gitaccountforprashant/gittest,dariver/jenkins,dariver/jenkins,dariver/jenkins,dariver/jenkins,ikedam/jenkins,bkmeneguello/jenkins,ErikVerheul/jenkins,oleg-nenashev/jenkins,daniel-beck/jenkins,protazy/jenkins,v1v/jenkins,SebastienGllmt/jenkins,NehemiahMi/jenkins,escoem/jenkins,andresrc/jenkins,kohsuke/hudson,ErikVerheul/jenkins,varmenise/jenkins,ajshastri/jenkins,jenkinsci/jenkins,ikedam/jenkins,jglick/jenkins,andresrc/jenkins,SebastienGllmt/jenkins,patbos/jenkins,rlugojr/jenkins,bkmeneguello/jenkins,damianszczepanik/jenkins,rlugojr/jenkins,recena/jenkins,sathiya-mit/jenkins,ajshastri/jenkins,lilyJi/jenkins,dennisjlee/jenkins,batmat/jenkins,ajshastri/jenkins,bkmeneguello/jenkins,pjanouse/jenkins,DanielWeber/jenkins,fbelzunc/jenkins,olivergondza/jenkins,hplatou/jenkins,jenkinsci/jenkins,samatdav/jenkins,ErikVerheul/jenkins,olivergondza/jenkins,andresrc/jenkins,jglick/jenkins,DanielWeber/jenkins,stephenc/jenkins,ydubreuil/jenkins,gusreiber/jenkins,ydubreuil/jenkins,batmat/jenkins,gitaccountforprashant/gittest,Vlatombe/jenkins,aldaris/jenkins,varmenise/jenkins,damianszczepanik/jenkins,wuwen5/jenkins,christ66/jenkins,protazy/jenkins,batmat/jenkins,ikedam/jenkins,kohsuke/hudson,MarkEWaite/jenkins,pjanouse/jenkins,bpzhang/jenkins,ajshastri/jenkins,sathiya-mit/jenkins,viqueen/jenkins,NehemiahMi/jenkins,jpbriend/jenkins,bkmeneguello/jenkins,andresrc/jenkins,jglick/jenkins,escoem/jenkins,samatdav/jenkins,ndeloof/jenkins,ajshastri/jenkins,fbelzunc/jenkins,Jimilian/jenkins,alvarolobato/jenkins,rlugojr/jenkins,Jochen-A-Fuerbacher/jenkins,patbos/jenkins,MichaelPranovich/jenkins_sc,vjuranek/jenkins,godfath3r/jenkins,ndeloof/jenkins,sathiya-mit/jenkins,aldaris/jenkins,godfath3r/jenkins,olivergondza/jenkins,ajshastri/jenkins,samatdav/jenkins,MarkEWaite/jenkins,patbos/jenkins,rsandell/jenkins,lilyJi/jenkins,kohsuke/hudson,Vlatombe/jenkins,godfath3r/jenkins,azweb76/jenkins,godfath3r/jenkins,Vlatombe/jenkins,Ykus/jenkins,jenkinsci/jenkins,jenkinsci/jenkins,christ66/jenkins,tfennelly/jenkins,wuwen5/jenkins,batmat/jenkins,varmenise/jenkins,rsandell/jenkins,azweb76/jenkins,fbelzunc/jenkins,gusreiber/jenkins,sathiya-mit/jenkins,sathiya-mit/jenkins,Jochen-A-Fuerbacher/jenkins,viqueen/jenkins,evernat/jenkins,SebastienGllmt/jenkins,evernat/jenkins,Jochen-A-Fuerbacher/jenkins,fbelzunc/jenkins,v1v/jenkins,evernat/jenkins,MarkEWaite/jenkins,vjuranek/jenkins,oleg-nenashev/jenkins,Jimilian/jenkins,DanielWeber/jenkins,gusreiber/jenkins,DanielWeber/jenkins,dennisjlee/jenkins,MichaelPranovich/jenkins_sc,christ66/jenkins,alvarolobato/jenkins,Ykus/jenkins,escoem/jenkins,Jochen-A-Fuerbacher/jenkins,viqueen/jenkins,andresrc/jenkins,rsandell/jenkins,viqueen/jenkins,Ykus/jenkins,MichaelPranovich/jenkins_sc,ErikVerheul/jenkins,tfennelly/jenkins,oleg-nenashev/jenkins,Ykus/jenkins,ydubreuil/jenkins,ydubreuil/jenkins,fbelzunc/jenkins,Ykus/jenkins,Vlatombe/jenkins,NehemiahMi/jenkins,evernat/jenkins,damianszczepanik/jenkins,protazy/jenkins,bpzhang/jenkins,amuniz/jenkins,ndeloof/jenkins,olivergondza/jenkins,dariver/jenkins,hplatou/jenkins,tfennelly/jenkins,ikedam/jenkins,amuniz/jenkins,stephenc/jenkins,jenkinsci/jenkins,varmenise/jenkins,ikedam/jenkins,wuwen5/jenkins,evernat/jenkins