Bug 1107700

I'm having issues registering DNS using 1.5.0-1.  I'm using a smart-proxy configured with nsupdate-tsig.  It worked perfectly prior to 1.5.0-1, now I'm getting this error:

Failed to save: Create DNS record for test1111111.mydomain.com                                                           task failed with the following error: ERF12-2357 [ProxyA                                                           PI::ProxyException]: Unable to set DNS entry ([RestClient::Bad                                                           Request]: 400 Bad Request) for proxy https://puppet.mydomain.com:                                                         8443/dns
  Rendered hosts/_progress.html.erb (0.2ms)
  Rendered puppetclasses/_selectedClasses.html.erb (0.0ms)
  Rendered puppetclasses/_classes_in_groups.html.erb (0.0ms)
  Rendered puppetclasses/_classes.html.erb (31.5ms)
  Rendered puppetclasses/_class_selection.html.erb (80.5ms)
  Rendered hosts/_compute.html.erb (5.4ms)
  Rendered common/_domain.html.erb (5.9ms)
  Rendered hosts/_interfaces.html.erb (7.1ms)
  Rendered common/os_selection/_architecture.html.erb (3.7ms)
  Rendered common/os_selection/_operatingsystem.html.erb (7.1m                                                           s)
  Rendered hosts/_operating_system.html.erb (16.8ms)
  Rendered hosts/_unattended.html.erb (43.5ms)
  Rendered puppetclasses/_class_parameters.html.erb (240.0ms)
  Rendered puppetclasses/_classes_parameters.html.erb (249.2ms                                                           )
  Rendered common_parameters/_inherited_parameters.html.erb (0                                                           .1ms)
  Rendered common_parameters/_puppetclass_parameter.html.erb (                                                           3.4ms)
  Rendered common_parameters/_puppetclasses_parameters.html.er                                                           b (5.1ms)
  Rendered common_parameters/_parameter.html.erb (2.5ms)
  Rendered common_parameters/_parameters.html.erb (24.4ms)
  Rendered hosts/_form.html.erb (455.3ms)
  Rendered hosts/new.html.erb within layouts/application (456.                                                           8ms)
  Rendered home/_user_dropdown.html.erb (1.3ms)
Read fragment views/tabs_and_title_records-2 (0.1ms)
  Rendered home/_topbar.html.erb (2.4ms)
  Rendered layouts/base.html.erb (3.8ms)
Completed 200 OK in 15095ms (Views: 435.0ms | ActiveRecord: 43                                                           .6ms)