Allign docker doc (#1500)

* allign docker documentation
* remove fabric8 files as this is duplicated way for building docker images (along with docker files)

Signed-off-by: Marinov Avgustin <Avgustin.Marinov@bosch.com>

hawkbit-runtime/pom.xml

@@ -93,20 +93,6 @@
       </resources>
    </build>
 
-   <profiles>
-      <profile>
-         <id>docker</id>
-         <build>
-            <plugins>
-               <plugin>
-                  <groupId>io.fabric8</groupId>
-                  <artifactId>docker-maven-plugin</artifactId>
-               </plugin>
-            </plugins>
-         </build>
-      </profile>
-   </profiles>
-
    <modules>
       <module>hawkbit-ddi-server</module>
       <module>hawkbit-dmf-server</module>