Hiding postgresql password in connection string

Closes-Bug: #1266804
Change-Id: Iafc820d6201acf5b563b62bd9f20a715901f1ab4
Add bool_type dictionary to test_migrations

A number of MySQL migration tests fail because the test case
is verifying that an sqlalchemy.types.BOOLEAN column was created.
When the column type is checked, however, mysql reports the type as
sqlalchemy.dialects.mysql.TINYINT.  The mismatch causes numerous
test cases to fail for MySQL.

This creates a dictionary for each engine being tested to handle the
different boolean types.

postgresql and DB2 encounter similar issues.  Subsequent patches
will make the appropriate changes for those databases.

Change-Id: I81cb3c6feeacf887f1f473ec54414e0e215d2c24
Closes-bug: 1260126
Remove unused message from iogrp_data setup

The iogrp_data is initialized during do_setup loaded.
The vdisk_count is originally used but later removed.
In ValueException raised, the variable is no longer required.
Remove this will give a clearer message when 
ValueException raised.

Change-Id: Ib7b6c6a870ddd7932e8da1436d615f9ee458bd93
Closes-Bug: #1266321
Merge "Remove unused message from iogrp_data setup"
Merge "Hiding postgresql password in connection string"
Merge "Add bool_type dictionary to test_migrations"