THRIFT-2832 c_glib: Handle string lists correctly
Client: c_glib
Patch: Simon South <ssouth@simonsouth.com>

The compiler now correctly generates code for string lists (i.e. variables of type list<string>) that are
- Passed as a parameter to a service method,
- Returned from a service method or
- Assigned a default value.

Added a unit test that covers containers (initially only string lists) used as parameters to and return values from
service methods, and as members with default values inside structs.
diff --git a/lib/c_glib/test/ContainerTest.thrift b/lib/c_glib/test/ContainerTest.thrift
new file mode 100644
index 0000000..c19bae4
--- /dev/null
+++ b/lib/c_glib/test/ContainerTest.thrift
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.
+ */
+
+namespace c_glib TTest
+
+struct ContainersWithDefaultValues {
+  1: list<string> StringList = [ "Apache", "Thrift" ];
+}
+
+service ContainerService {
+  void receiveStringList(1: list<string> stringList);
+  list<string> returnStringList();
+}