Merge branch 'bug/12231_rebase' into develop

Merge branch 'bug/12231_rebase' into develop

Support for Ballooning RAM added.

* bug/12231_rebase:
  migration: renamed 0015
  vm and template details: min/max ram shown
  migration-templates: added minmem to the model
  instance_to_template: added check for minram
  vm-details: now shows min and max ram range
  template_to_instance: works with ballooning ram
  vm-creation: re-ordered min and max mem
  vm-creation: validation fix for min/max memory.
  modify-vm: handles ballooning ram
  tests: added minmem to the beparams of the MockCluster
  vm-wizard: Updated the form for min and max memory
  models: added minram to VirtualMachine, created migration as well
  caps: using a more sensible name for balooning ram check