Fix Cassandra schema version check

[yycptt]

What changed?

• Fix Cassandra schema version check

Why?
Cassandra field in Datastore config is deprecated as part of the nosql plugin refactoring. As a result, the schema version check for cassandra is skipped on service start up.

How did you test it?
Tested locally.

Potential risks

Release notes

Documentation Changes

[coveralls]

Pull Request Test Coverage Report for Build ceff7365-c807-42d7-a66a-ac213962655b

• 0 of 13 (0.0%) changed or added relevant lines in 1 file are covered.
• 67 unchanged lines in 5 files lost coverage.
• Overall coverage increased (+0.04%) to 60.231%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
tools/cassandra/handler.go	0	13	0.0%

Files with Coverage Reduction	New Missed Lines	%
tools/cassandra/handler.go	1	12.78%
common/task/weightedRoundRobinTaskScheduler.go	2	89.12%
common/cache/lru.go	3	90.73%
common/persistence/cassandra/cassandraPersistence.go	3	54.42%
common/persistence/cassandra/cassandraPersistenceUtil.go	58	85.37%

Totals
Change from base Build 28a8ed6c-64ac-46ea-b6a2-963b3fc1a106:	0.04%
Covered Lines:	88879
Relevant Lines:	147563

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💛 - Coveralls