PDI-11306: Initial mapr31 shim
[PDI-11036]: FileSystem.isDirectory() is deprecated.  Use isDir().  Fixes two failing test cases.  Fixed packaging path in several places.  Added mapr31 to build list. Updated mapr31 jars.
Merge pull request #77 from pentaho-skarmali/PDI-11306_mapr31_5

[PDI-11306] MapR 3.1 Shim Support