Updated JDBC to 5.1.31
Added ExtendedPacketTester which facilitates extended packet mirror
testing by handling necessary variable and setting updates.
Ignore testPE1559() if payload resource not available.
Created a special exception class to represent the case of missing large
resource file. Catching this particular type should help us avoid
skipping a test for a wrong reason.
Exception naming fix.
Add error mapping for unknown system variable.  Arrange for location tracing.
Add second exception hierarchy for checked mapped exceptions.  Rearrange the location
computation slightly.  Add known vars for have_dynamic_loading (default false for now),
version_compile_os (default "debian-linux-gnu") in order to help along mts.  Add the
ability for PEDDL to not load the named template if the template is preloaded.
Merge branch 'master' into kanzaros_eh