Use the stored password instead of prompting for it all the time

EGit change Iba3b87293c22e5fe7d989fc312184aa7463c4387 is also required
to make this work for EGit.

Change-Id: Iedc80e133e66d72e78ff0980b6e12634f75eca36
Signed-off-by: Carsten Pfeiffer <carsten.pfeiffer@gebit.de>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

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

@@ -279,5 +279,15 @@ public abstract class CredentialItem {
 		public Password() {
 			super(JGitText.get().credentialPassword, true);
 		}
+
+		/**
+		 * Initialize a new password item, with given prompt.
+		 *
+		 * @param msg
+		 *            prompt message
+		 */
+		public Password(String msg) {
+			super(msg, true);
+		}
 	}
 }

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

@@ -105,9 +105,9 @@ public class CredentialsProviderUserInfo implements UserInfo,
 	}
 
 	public boolean promptPassword(String msg) {
-		CredentialItem.StringType v = newPrompt(msg);
-		if (provider.get(uri, v)) {
-			password = v.getValue();
+		CredentialItem.Password p = new CredentialItem.Password(msg);
+		if (provider.get(uri, p)) {
+			password = new String(p.getValue());
 			return true;
 		} else {
 			password = null;