Set up security keys while constructing NATable

This change corrects a problem in NATable by setting up the
secKeySet_ ComSecurityKeySet while the NATable is constructed.
In this way, the NATable::resetAfterStatement method will not
flag it as a leak. This change also includes a new regression
test for REVOKE and query invalidation.

Change-Id: Ie2ac5a2380007a53ab13c95f154e02ad1bde191e
Closes-Bug: #1371199