Use fixed version of fogbugz gem

This allows us to properly handle authentication errors.

Gemfile

@@ -158,7 +158,7 @@ gem "slack-notifier", "~> 1.0.0"
 gem 'asana', '~> 0.0.6'
 
 # FogBugz integration
-gem 'ruby-fogbugz'
+gem 'ruby-fogbugz', '~> 0.2.0'
 
 # d3
 gem 'd3_rails', '~> 3.5.5'

Gemfile.lock

@@ -575,8 +575,8 @@ GEM
       powerpack (~> 0.0.6)
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.4)
-    ruby-fogbugz (0.1.1)
-      crack
+    ruby-fogbugz (0.2.0)
+      crack (~> 0.4)
     ruby-progressbar (1.7.1)
     ruby-saml (1.0.0)
       nokogiri (>= 1.5.10)
@@ -849,7 +849,7 @@ DEPENDENCIES
   rqrcode-rails3
   rspec-rails (~> 3.3.0)
   rubocop (= 0.28.0)
-  ruby-fogbugz
+  ruby-fogbugz (~> 0.2.0)
   sanitize (~> 2.0)
   sass-rails (~> 4.0.5)
   sdoc

app/controllers/import/fogbugz_controller.rb

@@ -2,7 +2,6 @@ class Import::FogbugzController < Import::BaseController
   before_action :verify_fogbugz_import_enabled
   before_action :user_map, only: [:new_user_map, :create_user_map]
 
-  # Doesn't work yet due to bug in ruby-fogbugz, see below
   rescue_from Fogbugz::AuthenticationException, with: :fogbugz_unauthorized
 
   def new
@@ -13,8 +12,8 @@ class Import::FogbugzController < Import::BaseController
     begin
       res = Gitlab::FogbugzImport::Client.new(import_params.symbolize_keys)
     rescue
-      # Needed until https://github.com/firmafon/ruby-fogbugz/pull/9 is merged
-      return redirect_to :back, alert: 'Could not authenticate with FogBugz, check your URL, email, and password'
+      # If the URI is invalid various errors can occur
+      return redirect_to new_import_fogbugz_path, alert: 'Could not connect to FogBugz, check your URL'
     end
     session[:fogbugz_token] = res.get_token
     session[:fogbugz_uri] = params[:uri]
@@ -92,8 +91,7 @@ class Import::FogbugzController < Import::BaseController
   end
 
   def fogbugz_unauthorized(exception)
-    flash[:alert] = exception.message
-    redirect_to new_import_fogbugz_path
+    redirect_to new_import_fogbugz_path, alert: exception.message
   end
 
   def import_params