ci: Allow multiple commands in snf-ci script

Allow snf-ci script to accept a comma seperated list of commands to run.

ci/snf-ci

@@ -27,7 +27,7 @@ AVAILABLE_COMMANDS = [
     RUN_BURNIN_CMD,
 ]
 
-USAGE = """usage: %%prog [options] command
+USAGE = """usage: %%prog [options] command[,command...]
 
 command:
     * %s: Create the slave server
@@ -100,18 +100,22 @@ def main():  # Too many branches. pylint: disable-msg=R0912
         print msg
         return
 
-    command = args[0]
-    if command == ALL_CMDS:
+    commands = args[0]
+    if commands == ALL_CMDS:
         for cmd in AVAILABLE_COMMANDS:
             setattr(options, cmd, True)
-    elif command not in AVAILABLE_COMMANDS:
-        msg = "ERROR: Unknown command: %s" % command
-        parser.print_help()
-        print
-        print msg
-        return
+
     else:
-        setattr(options, command, True)
+        commands = commands.split(",")
+        for command in commands:
+            if command not in AVAILABLE_COMMANDS:
+                msg = "ERROR: Unknown command: %s" % command
+                parser.print_help()
+                print
+                print msg
+                return
+            else:
+                setattr(options, command, True)
 
     synnefo_ci = SynnefoCI(config_file=options.config_file,
                            build_id=options.build_id,