switch to use ceilometer specific connections

in Juno/Kilo, we added ceilometer purpose specific connections for:
metering, alarms, event. Rather than piggyback off oslo.db's
connection option (which gives misleading sql help message), we
should use Ceilometer specific connections.

Change-Id: I7703b73708a5807fb8de89fbb828f06b488acf69
Install bash completion for glanceclient

This installs the new bash-complete file in the standard location,
alongside the rest of the completion files:

    /etc/bash_completion.d/glance.bash_completion

Change-Id: I2944c47d857f7125f370b2b1ee041d1282db09c5
Merge "switch to use ceilometer specific connections"
Merge "Install bash completion for glanceclient"