Prepare RSpec and rubocop.yml for merge of v1.5.2 (#1071)

* add ContentType for POST requests in server-tag related RSpec

* increase rubocop PerceivedComplexity limit 20

* Update .rubocop.yml

---------

Co-authored-by: Ahmad Farhat <ahmad.af.farhat@gmail.com>
Co-authored-by: Ahmad Farhat <ahmad.farhat@blindsidenetworks.com>

.rubocop.yml

@@ -131,7 +131,7 @@ Metrics/BlockLength:
 
 # A complexity metric geared towards measuring complexity for a human reader.
 Metrics/PerceivedComplexity:
-  Max: 17
+  Max: 21
   Exclude:
     - app/models/recording.rb
     - app/models/server.rb

spec/requests/servers_controller_spec.rb

@@ -149,7 +149,7 @@
     context 'when updating tag' do
       it 'updates the server tag' do
         server = create(:server)
-        post scalelite_api_update_server_url, params: { id: server.id, server: { tag: 'test-tag' } }
+        post scalelite_api_update_server_url, params: { id: server.id, server: { tag: 'test-tag' } }, as: :json
         updated_server = Server.find(server.id) # Reload
         expect(updated_server.tag).to eq("test-tag")
         expect(response).to have_http_status(:ok)
@@ -159,10 +159,10 @@
 
       it 'updates the server tag back to nil' do
         server = create(:server)
-        post scalelite_api_update_server_url, params: { id: server.id, server: { tag: 'test-tag' } }
+        post scalelite_api_update_server_url, params: { id: server.id, server: { tag: 'test-tag' } }, as: :json
         updated_server = Server.find(server.id) # Reload
         expect(updated_server.tag).to eq("test-tag")
-        post scalelite_api_update_server_url, params: { id: server.id, server: { tag: '' } }
+        post scalelite_api_update_server_url, params: { id: server.id, server: { tag: '' } }, as: :json
         updated_server = Server.find(server.id) # Reload
         expect(updated_server.tag).to be_nil
         expect(response).to have_http_status(:ok)