4.x: Fix tablet update for non-select queries

[dkropachev]

Before fix:

java.lang.AssertionError: Found queries that got no tablet info: 
Statement DELETE_CK_CONCRETE_PREPARED on session REGULAR did not trigger session tablets update
Statement INSERT_CK_CONCRETE_PREPARED on session REGULAR did not trigger session tablets update
Statement UPDATE_PREPARED on session REGULAR did not trigger session tablets update
Statement INSERT_PREPARED on session REGULAR did not trigger session tablets update
Statement DELETE_PREPARED on session REGULAR did not trigger session tablets update
Statement UPDATE_CK_CONCRETE_PREPARED on session REGULAR did not trigger session tablets update
Statement UPDATE_NO_KS_PREPARED on session USE_KEYSPACE did not trigger session tablets update
Statement DELETE_CK_CONCRETE_PREPARED on session USE_KEYSPACE did not trigger session tablets update
Statement INSERT_NO_KS_PREPARED on session USE_KEYSPACE did not trigger session tablets update
Statement INSERT_CK_CONCRETE_PREPARED on session USE_KEYSPACE did not trigger session tablets update
Statement UPDATE_PREPARED on session USE_KEYSPACE did not trigger session tablets update
Statement INSERT_PREPARED on session USE_KEYSPACE did not trigger session tablets update
Statement DELETE_PREPARED on session USE_KEYSPACE did not trigger session tablets update
Statement DELETE_NO_KS_PREPARED on session USE_KEYSPACE did not trigger session tablets update
Statement UPDATE_CK_CONCRETE_PREPARED on session USE_KEYSPACE did not trigger session tablets update
Statement UPDATE_NO_KS_PREPARED on session WITH_KEYSPACE did not trigger session tablets update
Statement DELETE_CK_CONCRETE_PREPARED on session WITH_KEYSPACE did not trigger session tablets update
Statement INSERT_NO_KS_PREPARED on session WITH_KEYSPACE did not trigger session tablets update
Statement INSERT_CK_CONCRETE_PREPARED on session WITH_KEYSPACE did not trigger session tablets update
Statement UPDATE_PREPARED on session WITH_KEYSPACE did not trigger session tablets update
Statement INSERT_PREPARED on session WITH_KEYSPACE did not trigger session tablets update
Statement DELETE_PREPARED on session WITH_KEYSPACE did not trigger session tablets update
Statement DELETE_NO_KS_PREPARED on session WITH_KEYSPACE did not trigger session tablets update
Statement UPDATE_CK_CONCRETE_PREPARED on session WITH_KEYSPACE did not trigger session tablets update

Fixes: #500

[dkropachev]

By some reasonTabletMapSchemaChangesIT start failing, diggin into it.

[dkropachev]

Regarding TabletMapSchemaChangesIT, failure not related to this fix, there is another bug somewhere else.
Most-likely it is #505, let's merge that one, rebase and see if it passes.

[dkropachev]

@Bouncheck , as I guessed failures were fixed by #505