Adapted resources to reflect switch to sonarcloud (#1290)

* adapted Readme and resources to reflect sonarcloud
* fixed badges

CONTRIBUTING.md

@@ -19,7 +19,7 @@ Please read this if you intend to contribute to the project.
   * we follow the standard [scss-lint](https://github.com/brigade/scss-lint/) rules with the following exception:
     * disabled rules: ImportantRule, PropertySortOrder
 * Sonarqube:
-  * Our rule set can be found [here](https://sonar.ops.bosch-iot-rollouts.com/projects) with navigating to the tab "Quality Profiles", selecting "hawkBit", and then selecting "Actions" - "Back up"
+  * Our rule set can be found [here](https://sonarcloud.io/organizations/bosch-iot-rollouts/rules)
 
 ### Utility library usage
 

README.md

@@ -5,11 +5,11 @@
 Eclipse [hawkBit](http://www.eclipse.org/hawkbit/index.html) is an domain independent back end solution for rolling out software updates to constrained edge devices as well as more powerful controllers and gateways connected to IP based networking infrastructure.
 
 Build: [![Circle CI](https://circleci.com/gh/eclipse/hawkbit.svg?style=shield)](https://circleci.com/gh/eclipse/hawkbit)
-[![SonarQuality](https://sonar.ops.bosch-iot-rollouts.com/api/badges/gate?key=org.eclipse.hawkbit:hawkbit-parent)](https://sonar.ops.bosch-iot-rollouts.com)
+[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=org.eclipse.hawkbit%3Ahawkbit-parent&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=org.eclipse.hawkbit%3Ahawkbit-parent)
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/org.eclipse.hawkbit/hawkbit-parent/badge.svg)](https://maven-badges.herokuapp.com/maven-central/org.eclipse.hawkbit/hawkbit-parent)
+[![Maven Central](https://img.shields.io/maven-central/v/org.eclipse.hawkbit/hawkbit-parent?color=blue)](https://maven-badges.herokuapp.com/maven-central/org.eclipse.hawkbit/hawkbit-parent)
 [![Lines of code](https://img.shields.io/badge/dynamic/xml.svg?label=Lines%20of%20code&url=https%3A%2F%2Fwww.openhub.net%2Fprojects%2Fhawkbit.xml%3Fapi_key%3D30bc3f3fad087c2c5a6a67a8071665ba0fbe3b6236ffbf71b7d20849f4a5e35a&query=%2Fresponse%2Fresult%2Fproject%2Fanalysis%2Ftotal_code_lines&colorB=lightgrey)](https://www.openhub.net/p/hawkbit)
 
-Docker: [![Docker](https://images.microbadger.com/badges/version/hawkbit/hawkbit-update-server.svg)](https://hub.docker.com/r/hawkbit/hawkbit-update-server) [![Docker MYSQL](https://images.microbadger.com/badges/version/hawkbit/hawkbit-update-server:latest-mysql.svg)](https://hub.docker.com/r/hawkbit/hawkbit-update-server)
+Docker: [![Docker](https://img.shields.io/docker/v/hawkbit/hawkbit-update-server/latest?color=blue)](https://hub.docker.com/r/hawkbit/hawkbit-update-server) [![Docker MYSQL](https://img.shields.io/docker/v/hawkbit/hawkbit-update-server/latest-mysql?color=blue)](https://hub.docker.com/r/hawkbit/hawkbit-update-server)
 
 # Documentation
 

docs/layouts/partials/drawer.html

@@ -57,8 +57,8 @@
             </a>
           </li>
           <li>
-            <a href="https://sonar.ops.bosch-iot-rollouts.com" title="SonarQube Status" target="_blank">
+            <a href="https://sonarcloud.io/organizations/bosch-iot-rollouts/projects?sort=name" title="Sonarcloud Status" target="_blank">
-              <img src="https://sonar.ops.bosch-iot-rollouts.com/api/badges/gate?key=org.eclipse.hawkbit:hawkbit-parent" />
+              <img src="https://sonarcloud.io/api/project_badges/measure?project=org.eclipse.hawkbit%3Ahawkbit-parent&metric=alert_status" />
             </a>
           </li>
           <li>