Always run OSGi HTTP service on random port in itests (#11523)

It is probably always a good idea to run the OSGi HTTP service on a random available port in itests.
So when this is always done it prevents future issues and removes a bit of duplication.

Signed-off-by: Wouter Born <github@maindrain.net>

itests/org.openhab.binding.mielecloud.tests/pom.xml

@@ -22,27 +22,4 @@
     </dependency>
   </dependencies>
 
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>build-helper-maven-plugin</artifactId>
-        <executions>
-          <execution>
-            <id>reserve-network-port</id>
-            <goals>
-              <goal>reserve-network-port</goal>
-            </goals>
-            <phase>process-resources</phase>
-            <configuration>
-              <portNames>
-                <portName>org.osgi.service.http.port</portName>
-              </portNames>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
-    </plugins>
-  </build>
-
 </project>