wth - (SPARCRequest & SPARCDashboard) Switching PI Bug

On SPARCRequest and SPARCDashboard, when switching PIs by adding a new
primary PI on the protocol, it is defaulting the previous PI to
"Request/Approve Services" right, which doesn't exist any more.

I updated the two classes in /lib that handle this update and set the
project rights to 'approve'. [#145688447]

Pivotal Story - (https://www.pivotaltracker.com/story/show/145688447)

Steps to Test:
1. Find existing Protocol
2. Add a new Primary PI, which will replace the old one.
3. Proxy rights should remain as they were.

lib/associated_user_creator.rb

@@ -29,7 +29,7 @@ def initialize(params)
       @successful = true
       if @protocol_role.role == 'primary-pi'
         protocol.project_roles.primary_pis.each do |pr|
-          pr.update_attributes(project_rights: 'request', role: 'general-access-user')
+          pr.update_attributes(project_rights: 'approve', role: 'general-access-user')
         end
       end
       @protocol_role.save

lib/associated_user_updater.rb

@@ -34,7 +34,7 @@ def initialize(params)
 
       if @protocol_role.role == 'primary-pi'
         protocol.project_roles.where(role: 'primary-pi').where.not(identity_id: @protocol_role.identity_id).each do |pr|
-          pr.update_attributes(project_rights: 'request', role: 'general-access-user')
+          pr.update_attributes(project_rights: 'approve', role: 'general-access-user')
         end
       end