[Segment Replication] Fix Failing RelocationIT tests with Segment Replication Enabled.

[Rishikesh1159]

Describe the bug
Currently few tests in RelocationIT fail with segment replication enabled. Scope of this issue would be fixing those failing tests and creating an entire new IntegTest class for RelocationIT tests with segrep always enabled.

To Reproduce
Steps to reproduce the behavior:
Run testRelocationWhileRefreshing() of RelocationIT with Segment Replication enabled. It fails with exceptions and errors.

Expected behavior
A new IntegTest class having all RelocationIT tests and passing with segment replication enabled.

[Rishikesh1159]

RelocationIT has following 3 integ tests failing with segment replication enabled:

• testRelocationWhileRefreshing
• testRelocationWhileIndexingRandom
• testIndexSearchAndRelocationConcurrently

[mch2]

@Rishikesh1159 I believe we have versions of these tests now in SegmentReplicationRelocationIT - can this be closed?