MXS-1300: Fix deletion of monitors

The monitors should only be reused if they have the same name and they use
the same module. This way the only difference is in configuration.

Fixed MaxCtrl detection of bad options and altered monitor creation test
to expect correct results. Also improved some of the error messages.

maxctrl/lib/core.js

@@ -19,6 +19,8 @@ const maxctrl_version = '1.0.0';
 program
     .version(maxctrl_version)
     .strict()
+    .exitProcess(false)
+    .showHelpOnFail(false)
     .group(['u', 'p', 'h', 's', 't', 'q', 'tsv'], 'Global Options:')
     .option('u', {
         alias:'user',
@@ -96,6 +98,10 @@ module.exports.execute = function(argv, opts) {
 
     return new Promise(function(resolve, reject) {
         program
-            .parse(argv, {resolve: resolve, reject: reject})
+            .parse(argv, {resolve: resolve, reject: reject}, function(err, argv, output) {
+                if (err) {
+                    reject(err)
+                }
+            })
     })
 }