Merge pull request #75 from mattyb149/PDI-11772-5.0

PDI-11772: Remove legacy CDH shims from build
Merge pull request #76 from mattyb149/PDI-11772-5.0

PDI-11772 [SP-1179]: Remove mapr212 and mapr213 shims from build list
PDI-11463: Add cdh50 shim with SNAPSHOT artifacts