allow set/unset group_id at kafka message consumer

Change-Id: I138cb29b012536473f6aea21975b06013e84e043
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/osm_common/__init__.py b/osm_common/__init__.py
index edf5308..3073b42 100644
--- a/osm_common/__init__.py
+++ b/osm_common/__init__.py
@@ -15,6 +15,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-version = '0.1.18'
+version = '0.1.19'
 # TODO add package version filling commit id with 0's; e.g.:  '5.0.0.post11+00000000.dirty-1'
-date_version = '2019-01-28'
+date_version = '2019-02-18'