Fix wrong multi part exception message in response.

Hardening all exception message and classes in exception handler for
reponses

Signed-off-by: SirWayne <dennis.melzer@bosch-si.com>

hawkbit-repository/hawkbit-repository-api/src/main/java/org/eclipse/hawkbit/repository/exception/MultiPartFileUploadException.java

@@ -0,0 +1,30 @@
+/**
+ * Copyright (c) 2015 Bosch Software Innovations GmbH and others.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.eclipse.hawkbit.repository.exception;
+
+import org.eclipse.hawkbit.exception.SpServerError;
+import org.eclipse.hawkbit.exception.SpServerRtException;
+
+/**
+ * Thrown if a multi part exception occurred.
+ *
+ */
+public final class MultiPartFileUploadException extends SpServerRtException {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * @param cause
+     *            for the exception
+     */
+    public MultiPartFileUploadException(final Throwable cause) {
+        super(cause.getMessage(), SpServerError.SP_ARTIFACT_UPLOAD_FAILED, cause);
+    }
+
+}