Added validation for the keypair creation to prevent '/' and '\' chars in the name
Added the keypair name validation to the create keypair modal
Prevent ng-submit from processing when there exists unwanted chars in the keypair name
Moved the keypair error message as the default keypair error message for the form
Apply the ng-submit prevent condition for the create keypair modal on the instance launch wizard as well
Merge pull request #858 from eucalyptus/GUI-905

Gui 905 Do not allow '\' and '/' chars to be used in the keypair name