control: `member` signal triggers use event groups

Remove the ability to provide a `member` trigger's attributes from the
event trigger configuration in favor of using the configured event's
groups. This aligns with the recent design direction that event triggers
are setup from the event groups.

Change-Id: I304cfdffedd54317e440e7566988392a1410af6a
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
2 files changed