Merge pull request #12947 from djberg96/provision_template

Update Azure provision template to restrict VM names
(cherry picked from commit 5f9094f)

https://bugzilla.redhat.com/show_bug.cgi?id=1402528

product/dialogs/miq_dialogs/miq_provision_azure_dialogs_template.yaml

@@ -225,14 +225,18 @@
           :notes_display: :hide
         :vm_name: 
           :description: Instance Name
-          :required_method: :validate_vm_name
+          :required_method:
+            - :validate_vm_name
+            - :validate_regex
+          :required_regex: !ruby/regexp /^[^-_][a-zA-Z0-9_-]{1,15}(?<![-_])$/
+          :required_regex_fail_details: The name must be composed only of 1-15 English alphabet characters (a-z), numbers (0-9), dashes (-) or underscores (_). The first and last character must be an English alphabet character.
           :required: true
           :notes: 
           :display: :edit
           :data_type: :string
           :notes_display: :show
-          :min_length: 
-          :max_length:
+          :min_length: 1
+          :max_length: 15
       :display: :show
     :schedule:
       :description: Schedule