fix formating of version numbering (month)

Author: mitchellkrogza

travis-ci/modify-globalblacklist.sh

@@ -6,7 +6,7 @@
 # Start time of script generation
 start=$(date +%s.%N)
 versionyear=$(date +%Y)
-versionmonth=$(date +%M)
+versionmonth=$(date +%m)
 #MY_GIT_TAG=V2.2017.07.$TRAVIS_BUILD_NUMBER
 MY_GIT_TAG=V2.$versionyear.$versionmonth.$TRAVIS_BUILD_NUMBER