Add publishing processor

nifi-xmpp-processors/src/main/resources/META-INF/services/org.apache.nifi.processor.Processor

@@ -12,4 +12,5 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-fr.chickenkiller.nifi.processors.xmpp.ConsumeXMPP
+fr.chickenkiller.nifi.processors.xmpp.ConsumeXMPP
+fr.chickenkiller.nifi.processors.xmpp.PublishXMPP