CAMEL-7285: Upgrade camel-jcr to Jackrabbit 2.6.5

Rewrite JUnit tests to support change of default SecurityManager and
AccessManager in Jackrabbit 2.6.

Signed-off-by: Gregor Zurowski <gregor@zurowski.org>
Merge branch 'Jackrabbit265' of https://github.com/gzurowski/camel