Enable japicmp for new SSH bundle; update its baseline

In the original contribution of this bundle, japicmp was disabled
as no previous version to compare against existed. Enable it now.

Update the version to compare against to 5.2.0.201812061821-r.

Change-Id: I42f812befde2d0d98db5f87e05230b51af244ae6
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>

org.eclipse.jgit.ssh.apache/pom.xml

@@ -195,7 +195,7 @@
                   <ignoreMissingClasses>false</ignoreMissingClasses>
                   <skipPomModules>true</skipPomModules>
               </parameter>
-              <skip>true</skip><!-- TODO: Enable after the first release -->
+              <skip>false</skip>
           </configuration>
           <executions>
             <execution>
@@ -248,7 +248,7 @@
                   <ignoreMissingClasses>false</ignoreMissingClasses>
                   <skipPomModules>true</skipPomModules>
               </parameter>
-              <skip>true</skip><!-- TODO: Enable after the first release -->
+              <skip>false</skip>
           </configuration>
       </plugin>
     </plugins>

pom.xml

@@ -182,7 +182,7 @@
     <maven.build.timestamp.format>yyyyMMddHHmm</maven.build.timestamp.format>
     <bundle-manifest>${project.build.directory}/META-INF/MANIFEST.MF</bundle-manifest>
 
-    <jgit-last-release-version>4.11.0.201803080745-r</jgit-last-release-version>
+    <jgit-last-release-version>5.2.0.201812061821-r</jgit-last-release-version>
     <apache-sshd-version>2.0.0</apache-sshd-version>
     <jsch-version>0.1.54</jsch-version>
     <jzlib-version>1.1.1</jzlib-version>