TT#16162 Add lib/get_all_shared_names_by_role (extracted from mysql_values.cfg)

Change-Id: I9e493b0d36cf45a07a2387eb14f942c5e5b28ce6

lib/get_all_shared_names_by_role

@@ -0,0 +1,20 @@
+[%
+  # Return an array of Carrier nodes shared names with a given role
+  #
+  # @param argv.role    The role of the node to process
+  #                     One of: proxy, lb, mgmt
+  # @return out         The array of shared names:
+  #                     [ 'prx01', 'prx02', 'prx05' ]
+
+  out = []
+  blktmp.processed_hosts = {};
+  FOREACH host IN hosts.keys.sort;
+    NEXT IF blktmp.processed_hosts.$host.defined;
+    NEXT UNLESS hosts.$host.role.grep('^' _ argv.role _ '$').size();
+    peer = hosts.$host.peer;
+    blktmp.processed_hosts.$peer = 1;
+    matches = host.match('^(\w+[0-9])[ab]$');
+    out.push(matches.0);
+  END;
+  out = out.sort;
+-%]