Fix EmsAutomation alias pointing to AnsibleTower
Fix EmsAutomation alias pointing to AnsibleTower

This should be a generic ExternalAutomationManager not the AnsibleTower
provider specifically.

ManageIQ/manageiq,mzazrivec/manageiq,kbrock/manageiq,kbrock/manageiq,mzazrivec/manageiq,jrafanie/manageiq,ManageIQ/manageiq,jrafanie/manageiq,kbrock/manageiq,mzazrivec/manageiq,kbrock/manageiq,ManageIQ/manageiq,jrafanie/manageiq,ManageIQ/manageiq,jrafanie/manageiq,mzazrivec/manageiq