PE-1608 - Make sure the global sql_mode values are combined the same way
the SESSION values are to avoid accidental overriding.
Added the number of detected leaks to the exception message thrown from
our Netty leak detection code in PETest.
Improve the bootstrap process slightly:
- If upon startup the catalog is not available, diagnose why:
  + If there is a communications link failure, assume that the url is wrong and abort startup.
  + If the catalog cannot be found, assume that the catalog is empty and create a bootstrap catalog.
- Add the ability to create a bootstrap catalog.  The bootstrap catalog has the information schemas,
  and the system group.  No other persistent groups are created.  We create a bootstrap dynamic policy
  with a single dynamic site (on the catalog url).
Merge branch 'master' into kanzaros_bootstrap