Merge release 2.7

diff --cc pom.xml
index ff6574b163f396c62c773bbdd164c0c9db8feba6,37ad60c10e66c3d310252d7075c18d33068a2230..64b1db00539d9a8ae942bbb7aad843ca754f2fd1
--- 1/pom.xml
--- 2/pom.xml
+++ b/pom.xml
@@@ -274,6 -274,20 +274,20 @@@
                </rules>
              </configuration>
            </execution>
 -                <execution>
++          <execution>
+             <id>enforce-dependency-versions</id>
+             <goals>
+               <goal>enforce</goal>
+             </goals>
+             <configuration>
+               <rules>
+                 <requireReleaseDeps>
+                   <message>No SNAPSHOT versions allowed for dependencies</message>
+                   <onlyWhenRelease>true</onlyWhenRelease>
+                 </requireReleaseDeps>
+               </rules>
+             </configuration>
+           </execution>
            <execution>
              <id>enforce-java-version</id>
              <goals>