Issue 238: Prepare for 0.7 release (#239)

Signed-off-by: Raúl Gracia <[email protected]>

gradle.properties

@@ -8,20 +8,20 @@
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 ### Pravega dependencies
-pravegaVersion=0.7.0-2496.61a4b38-SNAPSHOT
-pravegaKeycloakVersion=0.7.0-13.8cd1997-SNAPSHOT
+pravegaVersion=0.7.0
+pravegaKeycloakVersion=0.7.0
 
 ### Pravega-samples output library
-samplesVersion=0.7.0-SNAPSHOT
+samplesVersion=0.7.0
 
 ### Flink-connector dependencies
-flinkConnectorVersion=0.7.0-53.f672135-SNAPSHOT
+flinkConnectorVersion=0.7.0
 flinkVersion=1.9.0
 flinkMajorMinorVersion=1.9
 flinkScalaVersion=2.12
 
 ### hadoop connector dependencies
-hadoopConnectorVersion=0.7.0-40.adc9d8a-SNAPSHOT
+hadoopConnectorVersion=0.7.0
 
 ### Samples application dependencies
 hadoopVersion=2.8.1