Add user permission api changes

Author: mpv1989

src/main/java/com/arangodb/ArangoDatabase.java

@@ -234,14 +234,12 @@ public void grantAccess(final String user, final Permissions permissions) throws
 	 * Grants access to the database for user user. You need permission to the _system database in order to execute this
 	 * call.
 	 *
-	 * @deprecated use {@link #grantAccess(String, Permissions)} instead
 	 * @see <a href= "https://docs.arangodb.com/current/HTTP/UserManagement/index.html#grant-or-revoke-database-access">
 	 *      API Documentation</a>
 	 * @param user
 	 *            The name of the user
 	 * @throws ArangoDBException
 	 */
-	@Deprecated
 	public void grantAccess(final String user) throws ArangoDBException {
 		executor.execute(grantAccessRequest(user, Permissions.RW), Void.class);
 	}
@@ -250,14 +248,12 @@ public void grantAccess(final String user) throws ArangoDBException {
 	 * Revokes access to the database dbname for user user. You need permission to the _system database in order to
 	 * execute this call.
 	 * 
-	 * @deprecated use {@link #grantAccess(String, Permissions)} instead
 	 * @see <a href= "https://docs.arangodb.com/current/HTTP/UserManagement/index.html#grant-or-revoke-database-access">
 	 *      API Documentation</a>
 	 * @param user
 	 *            The name of the user
 	 * @throws ArangoDBException
 	 */
-	@Deprecated
 	public void revokeAccess(final String user) throws ArangoDBException {
 		executor.execute(grantAccessRequest(user, Permissions.NONE), Void.class);
 	}

src/test/java/com/arangodb/ArangoDatabaseTest.java

@@ -303,6 +303,16 @@ public void getCollectionsExcludeSystem() {
 		}
 	}
 
+	@Test
+	public void grantAccess() {
+		try {
+			arangoDB.createUser("user1", "1234", null);
+			db.grantAccess("user1");
+		} finally {
+			arangoDB.deleteUser("user1");
+		}
+	}
+
 	@Test
 	public void grantAccessRW() {
 		try {
@@ -342,15 +352,15 @@ public void grantAccessUserNotFound() {
 	public void revokeAccess() {
 		try {
 			arangoDB.createUser("user1", "1234", null);
-			db.grantAccess("user1", Permissions.NONE);
+			db.revokeAccess("user1");
 		} finally {
 			arangoDB.deleteUser("user1");
 		}
 	}
 
 	@Test(expected = ArangoDBException.class)
 	public void revokeAccessUserNotFound() {
-		db.grantAccess("user1", Permissions.NONE);
+		db.revokeAccess("user1");
 	}
 
 	@Test