jcr2vfs: leftover from kie-commons to uberfire transition, org.kie.nio -> org.uberfire.nio

Description of problem:
Following line contains property name that is no longer correct (org.kie.nio.git.daemon.enabled), it should be renamed to org.uberfire.nio.git.daemon.enabled.

https://github.com/droolsjbpm/drools-wb/blob/6.0.x/drools-wb-jcr2vfs-migration/drools-wb-jcr2vfs-migration-core/src/main/java/org/drools/workbench/jcr2vfsmigration/Jcr2VfsMigrationApp.java#L73

It is a trivial fix, but since the 6.0.x branch should contain only 3 acked BZs, I am creating this BZ. I will sent a PR right away. Please merge it once the BZ has all acks.

Version-Release number of selected component (if applicable):
6.0.0-ER5 (+ community master and 6.0.x)