Work on #1367: cleanup cgCache.isEqualTo
Work on #1367: cleanup cgCache.isEqualTo

- make method private
- argument cannot be null, this has been checked by the caller already
- do not use if (test) return true; else return false;
- use StringUtils.equalsIgnoreCase() when a field could be null

matej116/cgeo,Huertix/cgeo,vishwakulkarni/cgeo,KublaikhanGeek/cgeo,kumy/cgeo,brok85/cgeo,ThibaultR/cgeo,superspindel/cgeo,Bananeweizen/cgeo,samueltardieu/cgeo,cgeo/cgeo,xiaoyanit/cgeo,mucek4/cgeo,mucek4/cgeo,brok85/cgeo,Bananeweizen/cgeo,kumy/cgeo,schwabe/cgeo,madankb/cgeo,madankb/cgeo,KublaikhanGeek/cgeo,samueltardieu/cgeo,auricgoldfinger/cgeo,kumy/cgeo,marco-dev/c-geo-opensource,xiaoyanit/cgeo,samueltardieu/cgeo,tobiasge/cgeo,rsudev/c-geo-opensource,vishwakulkarni/cgeo,lewurm/cgeo,schwabe/cgeo,auricgoldfinger/cgeo,SammysHP/cgeo,SammysHP/cgeo,pstorch/cgeo,yummy222/cgeo,lewurm/cgeo,tobiasge/cgeo,pstorch/cgeo,cgeo/cgeo,marco-dev/c-geo-opensource,superspindel/cgeo,yummy222/cgeo,ThibaultR/cgeo,SammysHP/cgeo,pstorch/cgeo,cgeo/cgeo,auricgoldfinger/cgeo,S-Bartfast/cgeo,rsudev/c-geo-opensource,S-Bartfast/cgeo,superspindel/cgeo,tobiasge/cgeo,brok85/cgeo,mucek4/cgeo,vishwakulkarni/cgeo,schwabe/cgeo,S-Bartfast/cgeo,cgeo/cgeo,Huertix/cgeo,madankb/cgeo,marco-dev/c-geo-opensource,matej116/cgeo,xiaoyanit/cgeo,ThibaultR/cgeo,schwabe/cgeo,yummy222/cgeo,Bananeweizen/cgeo,rsudev/c-geo-opensource,lewurm/cgeo,Huertix/cgeo,KublaikhanGeek/cgeo,matej116/cgeo