Move UserInitiated and ServerInitiated to a more general package

Those two annotations are currently only used by code relating to
groups. As we intend to use them for other code parts as well, we move
them to a more general package.

Change-Id: Ibab0e1b54d35f1a90f9ca8df8436893e764d91af

java/com/google/gerrit/server/UserInitiated.java

@@ -0,0 +1,34 @@
+// Copyright (C) 2017 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.server;
+
+import static java.lang.annotation.ElementType.FIELD;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.ElementType.PARAMETER;
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
+import com.google.inject.BindingAnnotation;
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+/**
+ * A marker for database modifications which are directly related to a user request (e.g. happen
+ * inside of a request context). Those modifications will be attributed to the user by using the
+ * user's identity as author and committer for all related NoteDb commits.
+ */
+@BindingAnnotation
+@Target({FIELD, PARAMETER, METHOD})
+@Retention(RUNTIME)
+public @interface UserInitiated {}