Set CONF_DIR to move config directories/files

Add configuration var CONF_DIR (default to '/etc') to allow
moving OpenStack project config files.  The common change
is to move them to $DEST:

    CONF_DIR=${DEST}/etc

Also allows setting individual project _CONF_DIR in cases where
that was not possible before this change.

Projects included in this round:
- ceilometer
- cinder
- glance
- heat
- ironic
- marconi
- savanna
- swift
- trove

BP: set-conf-dir
Change-Id: I6b057f3405ca97c20f6b7848b13980c8a936628b
Set CONF_DIR to move config directories/files

Add configuration var CONF_DIR (default to '/etc') to allow
moving OpenStack project config files.  The common change
is to move them to $DEST:

    CONF_DIR=${DEST}/etc

Also allows setting individual project _CONF_DIR in cases where
that was not possible before this change.

Projects included in this round:
- ceilometer
- cinder
- glance
- heat
- ironic
- marconi
- savanna
- swift
- trove

BP: set-conf-dir
Change-Id: I6b057f3405ca97c20f6b7848b13980c8a936628b
Set CONF_DIR to move config directories/files - 2

Projects included in this round:
- keystone: needs symlink to handle hard-coded paths
- neutron: also handle plugin conf files

Change-Id: I9250884e0e65524fd3eb06dabea225b642ce5467
Merge branch 'set-conf-dir-1' into dt-test
Merge branch 'set-conf-dir-2' into dt-test
Merge branch 'test-service-functions' into dt-test