Fix inconsistent gradle build version number.
Fix inconsistent gradle build version number.

Reviewed at https://reviews.apache.org/r/22056/

protochron/aurora,apache/aurora,rosmo/aurora,thinker0/aurora,rosmo/aurora,medallia/aurora,shahankhatch/aurora,thinker0/aurora,thinker0/aurora,wfarner/aurora,kidaa/aurora,protochron/aurora,rosmo/aurora,mschenck/aurora,mschenck/aurora,rdelval/aurora,kidaa/aurora,protochron/aurora,mschenck/aurora,rdelval/aurora,crashlytics/aurora,rdelval/aurora,mkhutornenko/incubator-aurora,thinker0/aurora,apache/aurora,wfarner/aurora,protochron/aurora,kidaa/aurora,kidaa/aurora,rdelval/aurora,apache/aurora,rosmo/aurora,apache/aurora,protochron/aurora,rosmo/aurora,medallia/aurora,shahankhatch/aurora,crashlytics/aurora,kidaa/aurora,rosmo/aurora,shahankhatch/aurora,mschenck/aurora,medallia/aurora,shahankhatch/aurora,apache/aurora,shahankhatch/aurora,rdelval/aurora,wfarner/aurora,thinker0/aurora,crashlytics/aurora,wfarner/aurora,crashlytics/aurora,protochron/aurora,crashlytics/aurora,mkhutornenko/incubator-aurora,shahankhatch/aurora,medallia/aurora,mkhutornenko/incubator-aurora,mschenck/aurora,medallia/aurora,kidaa/aurora,mkhutornenko/incubator-aurora,thinker0/aurora,mkhutornenko/incubator-aurora,wfarner/aurora,apache/aurora,medallia/aurora,crashlytics/aurora,rdelval/aurora,mschenck/aurora,wfarner/aurora