gayyappan 8c6ab3b039 Fix for deadlock between select and drop_chunks
Acquire foreign key related table locks prior to dropping chunks.  This
helps avoid deadlocks in scenarios where select and drop chunks are
trying to acquire locks on the same set of tables.
Changes to isolation test suite to prevent diffs related to displaying
hypertable id differences across test suite runs.

Fixes #865
2018-12-26 12:28:02 -05:00
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