Bump org.apache.maven.scm dependencies to be able to support Git v1.9.1.

Related to issue: https://issues.jenkins-ci.org/browse/JENKINS-22820

Author: Roger Hu

pom.xml

@@ -54,7 +54,7 @@
             <plugin>
                 <artifactId>maven-release-plugin</artifactId>
                 <!-- To have pushChanges parameter available -->
-                <version>2.1</version>
+                <version>2.5</version>
                 <configuration>
                     <!-- Git scm specific behaviour -->
                     <localCheckout>true</localCheckout>
@@ -125,7 +125,7 @@
   	<dependency>
       <groupId>org.apache.maven.scm</groupId>
       <artifactId>maven-scm-manager-plexus</artifactId>
-      <version>1.6</version>
+      <version>1.9.1</version>
       <!-- 
       <exclusions>
       	<exclusion>
@@ -158,7 +158,7 @@
     <dependency>
       <groupId>org.apache.maven.scm</groupId>
       <artifactId>maven-scm-provider-gitexe</artifactId>
-      <version>1.6</version>
+      <version>1.9.1</version>
     </dependency>