Spark thrift server restart fails during migration EU

Spark in IOP 4.2 BigInsights stack uses script name "thrift_server.py" instead of "spark_thrift_server.py" used by the common service Spark and the IOP 4.2.5 BigInsights stack.

This seemed to have caused the following error during migration EU where Spark thrift server failed to restart.
"""
Caught an exception while executing custom service command: <class 'ambari_agent.AgentException.AgentException'>: 'Script /var/lib/ambari-agent/cache/common-services/SPARK/1.2.1/package/scripts/thrift_server.py does not exist'; 'Script /var/lib/ambari-agent/cache/common-services/SPARK/1.2.1/package/scripts/thrift_server.py does not exist'
"""
We should be able to fix it by renaming "thrift_server.py" used in BI 4.2 stack to "spark_thrift_server.py" and updating metainfo.xml files accordingly.