Make mongodb 3.0 source name more descriptive
Make mongodb 3.0 source name more descriptive

travis-ci/apt-source-whitelist,bitbeans/apt-source-whitelist,arteymix/apt-source-whitelist,sumitsahrawat/apt-source-whitelist,gongo/apt-source-whitelist,Acidburn0zzz/apt-source-whitelist,lrowe/apt-source-whitelist,kaidokert/apt-source-whitelist,lovell/apt-source-whitelist,liljenstolpe/apt-source-whitelist