Split the importer module out from the installer module (#468)

* Split the importer module out from the installer module

* Cleanup of unused imports

* Move updater into separate module #453

* Remove unused imports/formatting

* Disable the install and importer modules at the end of the setup

* Unused imports; update IJ style

* test explicit stage for php+mysql

* add more to matrix

* Add different MariaDB versions

* undo

modules/Installer/Resources/views/install/dbtest.blade.php

@@ -0,0 +1,8 @@
+<div class="alert alert-{{ $status }}" role="alert">
+    <div class="container">
+        <div class="alert-icon">
+            <i class="now-ui-icons ui-1_bell-53"></i>
+        </div>
+        {{ $message }}
+    </div>
+</div>