Description of problem:

When you run the playbook to update the configuration for alerting, it wipes out the addition to the configmap to monitor etcd.  The user has to remember to add it back in.

Version-Release number of selected component (if applicable): 

3.11


How reproducible:

all the time

Steps to Reproduce:
1. Update config map to include etcd monitoring
2. Run the install playbook to update alerting configuration
3. Observe that etcd monitoring is not longer running

Actual results:
etcd monitoring is not running

Expected results:
if the playbook needs to be rerun for the alerting config adjustments, it shouldn't wipe out other supported configuration changes you've made.

Additional info: