SCHEMA-906. Skip the cassandra-maven-plugin and hbase-m-p correctly in cassandra submodule.
SCHEMA-906. Skip the cassandra-maven-plugin and hbase-m-p correctly in cassandra submodule.

issue: https://jira.kiji.org/browse/SCHEMA-906
review: https://review.kiji.org/r/2100

rpinzon/kiji-schema,kijiproject/kiji-schema,kijiproject/kiji-schema,rpinzon/kiji-schema,iafek/kiji-base,iafek/kiji-base