Merge pull request #136 from mattyb149/mapr21

PDI-9649: Added support for MapR 2.1 and MapRFS
Merge pull request #137 from mattyb149/mapr21

PDI-9649: Fixed unit tests for MapR 2.1 shim
Merge pull request #138 from mattyb149/mapr21

PDI-9649: Added excludes to MapR 2.1 shim ivy.xml
Merge pull request #139 from mattyb149/mapr21

PDI-9649: Added MapRFS support to VFS Browser
PDI-9556: Removed Cassandra steps from Big Data plugin
Merge pull request #140 from mattyb149/1.3

PDI-9556: Removed Cassandra steps from Big Data plugin
PDI-9556: Removed dependencies only used by Cassandra steps
Merge pull request #145 from mattyb149/pdi-9556-1.3

PDI-9556: Removed dependencies only used by Cassandra steps
PDI-9649: Updated dependencies to match MapR 2.1 cluster
Merge pull request #146 from mattyb149/pdi-9649-1.3

PDI-9649: Updated dependencies to match MapR 2.1 cluster
PDI-9649: Fixed typos in MapR 2.1 build.xml