Add mssql_ha_configure functionality

Add firewall, ha_cluster roles, required vars
Take setup tasks form ha_cluster role, the mssql_ha_replica_type fact
Print sqlcmd output only when it's available
Add HA functionality description to README.md
Add dependency for fedora.linux-system-roles in galaxy.yml
Not print output of gathering facts because output is too long with -v
Wait for mssql-server to prepare for client connections after restart
Only print sqlcmd output when it exists
Add tests for templates, fix bugs in templates
Add error message when running against RHEL < 8
Add mssql_ha_cluster_run_role and other related variables
Add mssql_ha_cluster_run_role
Add mssql_ha_stonith_resources
Add mssql_ha_cluster_print_vars

.collection/galaxy.yml

@@ -16,7 +16,8 @@ readme: "README.md"
 license:
   - MIT
 
-dependencies: {}
+dependencies:
+  - "fedora.linux-system-roles": "*"
 
 tags:
   - "mssql"