Removed 'message' keyword when raising Error

The exception handler for listing nova images (now glance images)
was raising an unexpected argument exception because Error() was
getting called with a 'message' keyword. Removed the keyword in
line with elsewhere.

Change-Id: If928aec0bb807495a00b8447a69c4e3dea43fb3b
Closes-Bug: 1315456
Add boolean type parameter process for template resource

When template resource generates properties from parameters, boolean
type parameter process is missed.

Change-Id: I893471776eafcbca57aae1556d9b6bf1d4b5bf53
Closes-Bug: #1329221
Instructions on image creation for SoftwareConfig.

Instructions on creating images that can be used for SoftwareConfig and
SoftwareDeployment are added.

Change-Id: If4bc6197ca38d73378ada6a6b32e47a658d88fc5
Prevent "No handlers could be found..." logging

To prevent this message from being logged during unit tests runs
or heat-manage calls, the following changes have been made:
* Make the instance_users deprecation warning use "warnings" and
  move to engine init
* patch out warnings for engine tests
* do not log barbican or marconi if importing their clients fails

Change-Id: Icc4be26bf334a6ce31ad3b8fe9fd244cd9e37be2
Closes-Bug: #1333408
Make some properties updatable for Volume resource

Make 'name', 'description' and 'metadata' updatable for
OS::Cinder::Volume resource.

Change-Id: I2783b689470ccbff0deab01df3df61e36e1a54d6
Closes-bug: #1330886
Merge "Prevent "No handlers could be found..." logging"
Merge "Removed 'message' keyword when raising Error"
Merge "Add boolean type parameter process for template resource"
Merge "Instructions on image creation for SoftwareConfig."
Merge "Make some properties updatable for Volume resource"