Fix test failure

The variable name '_' is used to ignore unused return value, but it
is conflict with default translate method imported.
Remove redundant meters list invocation.
modified image forms to support vmware template
ref #455
Merge 'Fix test failure'
Merge branch 'vmware-image' into develop
Adjust architecture form charfield to choicefield

Sometimes we will make a mistake carelessly, if we use optional
box, we will avoid this error

ref 487