Description of problem:
Smart Variable with space in its name allowed to create in a puppet class. Which should not be allowed.
And also after creating the smart variable, it is not viewable, editable and deletable too.

Version-Release number of selected component (if applicable):
foreman-1.11.0-0.develop.201511181617git2fc4d6d.el7.noarch

How reproducible:
Always

Steps to Reproduce:
1. Try to create a smart variable with name having blank space, from Config -> Classes -> Class -> Smart Variables tab.

Actual results:
Smart Variable with space in its name allowed to create in a puppet class.

Expected results:
1.Smart Variable with space in its name should not be allowed to create in a puppet class.
2. There should be a proper error message displayed saying space not allowed in variable name.