Description of problem:
Currently we are not able to re-configure Database Replication on Primary and Secondary.

Since it has been already configured it won't let you make changes if you accidental configured it wrong or have hardware changes. 

We should have a way (through console or documentation) on how to re-configure and not blow up in the appliance_console (exit cleanly).

ERROR message snippet:
==========================================
Replication Server Configuration

        Cluster Node Number:        1
        Cluster Database Name:      vmdb_production
        Cluster Database User:      root
        Cluster Database Password:  "********"
        Cluster Primary Host:       10.10.181.47
Apply this Replication Server Configuration? (Y/N): y
Configuring Primary Replication Server...
[2016-10-26 12:58:27] [ERROR] there is a master already in cluster
miq_region_99_cluster
Failed to configure replication server
/opt/rh/cfme-gemset/gems/awesome_spawn-1.4.1/lib/awesome_spawn.rb:105:in `run!': repmgr master register exit code: 1 (AwesomeSpawn::CommandResultError)
	from /var/www/miq/vmdb/gems/pending/appliance_console/database_replication.rb:101:in `block in run_repmgr_command'
	from /var/www/miq/vmdb/gems/pending/appliance_console/database_replication.rb:98:in `fork'
	from /var/www/miq/vmdb/gems/pending/appliance_console/database_replication.rb:98:in `run_repmgr_command'
	from /var/www/miq/vmdb/gems/pending/appliance_console/database_replication_primary.rb:43:in `initialize_primary_server'
	from /var/www/miq/vmdb/gems/pending/appliance_console/database_replication_primary.rb:39:in `activate'
	from /var/www/miq/vmdb/gems/pending/appliance_console.rb:488:in `block in <module:ApplianceConsole>'
	from /var/www/miq/vmdb/gems/pending/appliance_console.rb:109:in `loop'
	from /var/www/miq/vmdb/gems/pending/appliance_console.rb:109:in `<module:ApplianceConsole>'
	from /var/www/miq/vmdb/gems/pending/appliance_console.rb:95:in `<main>'
Database Replication not configured
==========================================








Version-Release number of selected component (if applicable):
5.7.0.1 Beta1

How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:


Additional info: