XNAT-4516 Added better task tracking and logging to initializating task executor, added automated completion and execution tracking, logging and messaging. Broke view creation/update code into stand-alone initializing task. Added check for table that gets updated so that queries don't error out.

Added config and init logging to log4j configuration, added more logging to PropertiesConfig to troubleshoot issues with Vagrant VM initialization.

XNAT-4232 Tangentially related, providing more logging info on XAPI execution, logging arc-spec initialization.

Moved initialization of object mapper builder, added more features and options to builder configuration. Added preference bean mixin to builder. Added log4j.properties to resources and disabled Turbine log4j load.

Added initialization SQL to bootstrap user info. Updated InstanceSettings.xml. Changed ${applicationRoot} to ${xnat.home} in log4j.properties. Removed my email address from services.properties. Added explicit references to 4.2.4.RELEASE versions of Spring dependencies.

integrate gradle-xnat-plugin and work out configuration for Cargo deploy
tasks.