OAK-1855 - Travis builds time out

Split of the build in multiple profiles and adding of the FixtureHelper.

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1622182 13f79535-47bb-0310-9956-ffa450edef68
OAK-2007 - MongoBlobStore improvements
Removing time filter while marking blobs as already being filtered while deleting.

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1622197 13f79535-47bb-0310-9956-ffa450edef68