OCL Java code generator optimizes away the first condition "not self.container().oclIsUndefined()" because it thinks that "self.container()" can never be null although the return value is marked optional (assuming a bug in Pivot OCL)

(cherry picked from commit 113e8c05)

enabled OCL validation + Workaround for Complete OCL validator initializer configurator issue (see comment in code)

* fatjar build switched to package-single phase

# Conflicts (resolved):
#	plugins/org.etsi.mts.tdl.common/src/org/etsi/mts/tdl/scoping/TDLScopeProvider.java
#	plugins/org.etsi.mts.tdl.helper/META-INF/MANIFEST.MF
#	plugins/org.etsi.mts.tdl.openapi2tdl.next/META-INF/MANIFEST.MF