Fixed ServiceDlg checkbox field:Required attribute not persisting issue

https://bugzilla.redhat.com/show_bug.cgi?id=1132014
Added missing route "iso_image_edit" for pxe controller

https://bugzilla.redhat.com/show_bug.cgi?id=1131326
Fix SmartState Analysis failures on non-English VMs.

Text retrieved from non-English Windows VMs may be encoded in
UTF-16. This text may contain byte sequences that are not valid
in UTF-8. Check the text for valid encoding, and convert to UTF-8
as needed.

https://bugzilla.redhat.com/show_bug.cgi?id=1126476
Fixes #293
Fixes #332
Merge pull request #430 from AparnaKarve/bz1132014_persist_required_checkbox_value

Fixed the issue in Service Dialog where the checkbox field - "Required" was not persisting its value
Merge pull request #434 from AparnaKarve/bz1131326_iso_image_edit_routing_error

Added missing route "iso_image_edit" for pxe controller
Merge pull request #425 from roliveri/german_vm

Fix SmartState Analysis failures on non-English VMs.