remote service: package signature verification, use string for service instead of getClass.getName

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/service/exception/WrongPackageSignatureException.java

@@ -0,0 +1,10 @@
+package org.sufficientlysecure.keychain.service.exception;
+
+public class WrongPackageSignatureException extends Exception {
+
+    private static final long serialVersionUID = -8294642703122196028L;
+
+    public WrongPackageSignatureException(String message) {
+        super(message);
+    }
+}