ODLPARENT-134: ensure correct startup with BC

ODLPARENT-134: ensure correct startup with BC

In Karaf 4.1, Bouncy Castle no longer starts correctly; or rather,
loading kpix results in prov being refreshed, which restarts sshd and
most of Karaf.

This patch cleans up the startup.properties construction, and enforces
the correct order for Bouncy Castle. It also adds metatype and
blueprint.core.compatibility which must be loaded at boot to avoid
unwanted refreshes.

Change-Id: Ic8e8e0e932b9d9eaea292003118ef1936b67b822
Signed-off-by: Stephen Kitt <skitt@redhat.com>