OPAL-2013 - added new flag indicating a commit is the current (latest) for a given path (variable/view)
Merge pull request #286 from kazoompa/bug-OPAL-2013

OPAL-2013
Fix OPAL-2001: DB creation - Select MySQL by default
Stop OpalRuntime with @PreDestroy
Extract install/upgrade stuff to new opal-upgrade Maven module
Create database & project
Add XSD
Refactor upgrade to 2.0
Remove bean OpalConfigurationService from upgrade-2.0 context
Add private constructor to Project builder
Configure OrientDB tables
Move version to XML
Work on upgrade to 2.0
Add config to disable variable summary cache
OPAL-2015