Fabric container versions should be allowed to change the 'description'

Issue

• In our organization, we use the description of a version as a logical description of an environment.
  For instance, we will create a version 1.0 as the production environment.

• But in case of mistake, it's not possible to change the description of an existing version.

JBossFuse:admin@test_fabric001> fabric:version-create --parent 1.0.0.1000 --description "test" 1.0
Error executing command: Version already exists: 1.0
JBossFuse:admin@test_fabric001> fabric:version-
fabric:version-create         fabric:version-delete         fabric:version-info           fabric:version-list           fabric:version-set-default