pom: enforce maven-release-plugin 2.4.2

pom.xml

@@ -60,6 +60,18 @@
                 <showDeprecation>true</showDeprecation>
             </configuration>
         </plugin>
+	<plugin>
+	    <groupId>org.apache.maven.plugins</groupId>
+	    <artifactId>maven-release-plugin</artifactId>
+	    <version>2.4.2</version>
+	    <dependencies>
+		<dependency>
+		    <groupId>org.apache.maven.scm</groupId>
+		    <artifactId>maven-scm-provider-gitexe</artifactId>
+		    <version>1.9</version>
+		</dependency>
+	    </dependencies>
+	</plugin>
     </plugins>
   </build>