[[JBJCA-887] Input validation for code generator
[JBJCA-887] update string properties
[JBJCA-887] add more input check for name, not primitive type
Fix [JBJCA-915] Activation of connector 1.5 archive doesn't happen, when ironjacamar.xml doesn't contain class-names
Allow null value for default slot
Only log failed attempts to unregister
Add a LeakDumperManagedConnectionPool