Fix API check errors introduced in ReceivePack in 945d43d5

- add missing @since tag on new field connectivityChecker
- suppress warning for this added field which may affect subclasses
which is ok

Change-Id: Id6c22258efd10fa3847290f3dcfa42893b6ae882
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/.settings/.api_filters

@@ -9,4 +9,12 @@
             </message_arguments>
         </filter>
     </resource>
+    <resource path="src/org/eclipse/jgit/transport/ReceivePack.java" type="org.eclipse.jgit.transport.ReceivePack">
+        <filter id="336658481">
+            <message_arguments>
+                <message_argument value="org.eclipse.jgit.transport.ReceivePack"/>
+                <message_argument value="connectivityChecker"/>
+            </message_arguments>
+        </filter>
+    </resource>
 </component>

org.eclipse.jgit/src/org/eclipse/jgit/transport/ReceivePack.java

@@ -288,7 +288,10 @@ public class ReceivePack {
 
 	private ReceivedPackStatistics stats;
 
-	/** Connectivity checker to use. */
+	/**
+	 * Connectivity checker to use.
+	 * @since 5.7
+	 */
 	protected ConnectivityChecker connectivityChecker = new FullConnectivityChecker();
 
 	/** Hook to validate the update commands before execution. */