update start/stop scripts

permit starting/stopping pods and services separately.

Change-Id: Iaff2a5b4d5a33467a9d10b10e9bd5c922eeed3aa
update existing keystone objects

when booting the keystone container with an existing database, make sure
to update credentials for admin user and replace existing keystone
endpoint in the service catalog.

Change-Id: I2c66d75210ef7ba5a96077eea15a8c564e99f662
clean up base Dockerfile

- run "yum update" after installing RDO repository (to ensure we get any
  package updates from this repository)
- "yum clean" after the "yum update" to prevent yum cache from being
  baked into the image

Change-Id: Id897fd85214855bb08f7e16da4bbdf07b821d991
add kolla-common shell library to base image

Change-Id: Ib670fe369bb8048aa69979b74a984fa4ddaae7d9
normalize start script name for rabbitmq

Change-Id: I5e7296780a34f36e28419b49e185be689e4745ad
clean yum cache after package install

Change-Id: Ib9942a12b8a14c7e04cf8ae3184cdefcdc5a4652
normalize keystone image

Change-Id: I68ee79bc760f5afe7b089e75aaf89a4e8d39b5ac
include mariadb in base image

Change-Id: I217b766a0c573e530da03aa81a7caf4548b0d2b3
normalize glance scripts

Change-Id: I666cf224166344744c6f15e7ebd462e89afa4c75