Updated openstack/openstack
Project: openstack/nova  93873c159785e4e6a50eabc9f6bf12209c6e043d
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Add test for class InsertFromSelect

InsertFromSelect is used to generate SQL statement like
"INSERT INTO table1 SELECt * FROM table2".

Change-Id: I0fec93463be1e9930b24862724b7a6d1c8cc52af