Remove haproxy galera monitoring user
Remove haproxy galera monitoring user

Prior to kilo, we created a static 'haproxy' MySQL user for haproxy.
In kilo and onwards, we now have a user variable called
galera_monitoring_user which defaults to monitoring.  This commit
updates scripts/run-upgrade.sh to remove the old haproxy user to
ensure we don't have a defunct MySQL user lying about.

Change-Id: I071596c4c6d881d5304fc49a7cf752d5489ee19b
Closes-Bug: #1472673

miguelgrinberg/os-ansible-deployment,wenhuizhang/os-ansible-deployment,shane-c/openstack-ansible,BjoernT/os-ansible-deployment,git-harry/os-ansible-deployment,sigmavirus24/openstack-ansible,robb-romans/openstack-ansible,major/openstack-ansible,mancdaz/openstack-ansible,major/os-ansible-deployment,shane-c/openstack-ansible,yanyao/openstack-ansible,sigmavirus24/os-ansible-deployment,git-harry/os-ansible-deployment,dhanunjaya/os-ansible-deployment,jpmontez/openstack-ansible,yanyao/openstack-deployment-liberty,Logan2211/openstack-ansible,sigmavirus24/os-ansible-deployment,os-cloud/os-ansible-deployment,jpmontez/openstack-ansible,mrda/openstack-ansible,robb-romans/openstack-ansible,cloudnull/os-ansible-deployment,mrda/openstack-ansible,yanyao/newton,AlphaStaxLLC/os-ansible-deployment,manuelfelipe/openstack-ansible,yanyao/openstack-ansible,wenhuizhang/os-ansible-deployment,AlphaStaxLLC/os-ansible-deployment,BjoernT/os-ansible-deployment,antonym/openstack-ansible,jpmontez/openstack-ansible,cfarquhar/openstack-ansible,openstack/openstack-ansible,Logan2211/openstack-ansible,mrda/openstack-ansible,os-cloud/os-ansible-deployment,bunchc/openstack-ansible,miguelgrinberg/os-ansible-deployment,shane-c/openstack-ansible,achekunov/openstack-ansible,open-switch/infra_openstack-ansible,dhanunjaya/os-ansible-deployment,jpmontez/os-ansible-deployment,major/os-ansible-deployment,mancdaz/openstack-ansible,antonym/openstack-ansible,stackforge/os-ansible-deployment,open-switch/infra_openstack-ansible,open-switch/infra_openstack-ansible,cloudnull/os-ansible-deployment,pombredanne/os-ansible-deployment,sti-jans/openstack-ansible,sti-jans/openstack-ansible,bunchc/openstack-ansible,manuelfelipe/openstack-ansible,manuelfelipe/openstack-ansible,cfarquhar/openstack-ansible,sigmavirus24/openstack-ansible,jpmontez/os-ansible-deployment,achekunov/openstack-ansible,AlphaStaxLLC/os-ansible-deployment,achekunov/openstack-ansible,git-harry/os-ansible-deployment,BjoernT/os-ansible-deployment,pombredanne/os-ansible-deployment,major/openstack-ansible,pombredanne/os-ansible-deployment,openstack/openstack-ansible,antonym/openstack-ansible,yanyao/newton,weezer/openstack-ansible,yanyao/openstack-deployment-liberty,stackforge/os-ansible-deployment,sti-jans/openstack-ansible,yanyao/openstack-deployment-liberty,BjoernT/openstack-ansible,weezer/openstack-ansible,jpmontez/os-ansible-deployment,BjoernT/openstack-ansible