Merge branch 'stable-4.8' into stable-4.9

* stable-4.8:
  Fix @since tag for LOCK_SUFFIX
  Prepare 4.7.4-SNAPSHOT builds
  JGit v4.7.3.201809090215-r

Change-Id: Id3c85149316cbe671e55f41438bd3a3a892b4ed0

org.eclipse.jgit/.settings/.api_filters

@@ -26,7 +26,7 @@
     <resource path="src/org/eclipse/jgit/lib/Constants.java" type="org.eclipse.jgit.lib.Constants">
         <filter id="1141899266">
             <message_arguments>
-                <message_argument value="4.8"/>
+                <message_argument value="4.7"/>
                 <message_argument value="4.9"/>
                 <message_argument value="LOCK_SUFFIX"/>
             </message_arguments>

org.eclipse.jgit/src/org/eclipse/jgit/lib/Constants.java

@@ -682,7 +682,7 @@ public final class Constants {
 	/**
 	 * Suffix of lock file name
 	 *
-	 * @since 4.8
+	 * @since 4.7
 	 */
 	public static final String LOCK_SUFFIX = ".lock"; //$NON-NLS-1$