Add read-only view of service dialog to request details view

Now approvers can see what options the user has selected to
assist in the manual approval process.

http://bugzilla.redhat.com/show_bug.cgi?id=1077424
Add a reconfigurable attribute to service dialog fields

A user can now indicate which fields within a service dialog
can be modified during a service reconfiguration action. Any
fields that are not flagged as reconfigurable will be
read-only.

http://bugzilla.redhat.com/show_bug.cgi?id=1077424
Create ServiceReconfigureRequest / Task model classes

In support of service reconfiguration, add request and
task classes to support the upcoming workflow.

http://bugzilla.redhat.com/show_bug.cgi?id=1077424
[WIP] Add support for service reconfigure

https://bugzilla.redhat.com/show_bug.cgi?id=1059834