Fixes trove create output

Reasons:
- When using trove create, the output for create instance shows all
  unwanted information as described in bug, like flavor details
  and datastore as a dict.

Changes:
- Moved the configuration attribute setting to top before setting up
  any other attribute.

Change-Id: I5d508f5ee3937097086f08bbfad3642f7d63f288
Closes-Bug: #1282338
Updated from global requirements

Change-Id: I7214f89c5bd7a236f068c8279d76aa23fc4a8d44
Merge "Updated from global requirements"
Merge "Fixes trove create output"