Removed direct references to option idgen module
	Updated references to use safe idgen utility class
	Updated settings page to not display idgen-derived settings when idgen is not loaded
	^inv-135 fixed
Updated to ignore java-version file.
Merge branch 'feature/safe_idgen' into develop
Merge branch 'develop' of github.com:OpenHMIS/openmrs-module-openhmis.inventory into develop