Impala Connection Plugin recovery support

[ivakoleva]

What is the feature request? What problem does it solve? It includes also error handling (recovery strategies we use). Since those might vary based on Impala version/configuration, it could be moved to custom plugin eventually, if not generic enough.

Suggested solution Extend vdk-impala plugin. Use db_connection_recover_operation hook specification to execute recovery strategies.

Acceptance criteria: Recovery of failed queries.