Fix vmpooler folder purging

This commit updates folder purging references to ensure that provider
name references are referring to the named provider, rather than the
provider type. Without this change folder purging fails because it
cannot identify target folders.

spec/unit/pool_manager_spec.rb

@@ -1418,16 +1418,24 @@ EOT
       )
     }
 
-    it 'should return a list of pool folders' do
-      expect(provider).to receive(:get_target_datacenter_from_config).with(pool).and_return(datacenter)
+    context 'when evaluating pool folders' do
+      before do
+        expect(subject).not_to be_nil
+        # Inject mock provider into global variable - Note this is a code smell
+        $providers = { provider_name => provider }
+      end
 
-      expect(subject.pool_folders(provider)).to eq(expected_response)
-    end
+      it 'should return a list of pool folders' do
+        expect(provider).to receive(:get_target_datacenter_from_config).with(pool).and_return(datacenter)
 
-    it 'should raise an error when the provider fails to get the datacenter' do
-      expect(provider).to receive(:get_target_datacenter_from_config).with(pool).and_raise('mockerror')
+        expect(subject.pool_folders(provider_name)).to eq(expected_response)
+      end
 
-      expect{ subject.pool_folders(provider) }.to raise_error(RuntimeError, 'mockerror')
+      it 'should raise an error when the provider fails to get the datacenter' do
+        expect(provider).to receive(:get_target_datacenter_from_config).with(pool).and_raise('mockerror')
+
+        expect{ subject.pool_folders(provider_name) }.to raise_error(RuntimeError, 'mockerror')
+      end
     end
   end
 
@@ -1456,20 +1464,28 @@ EOT
       )
     }
 
-    it 'should run purge_unconfigured_folders' do
-      expect(subject).to receive(:pool_folders).and_return(configured_folders)
-      expect(provider).to receive(:purge_unconfigured_folders).with(base_folders, configured_folders, whitelist)
-      expect(provider).to receive(:provider_config).and_return({})
+    context 'when purging folders' do
+      before do
+        expect(subject).not_to be_nil
+        # Inject mock provider into global variable - Note this is a code smell
+        $providers = { provider_name => provider }
+      end
 
-      subject.purge_vms_and_folders(provider)
-    end
+      it 'should run purge_unconfigured_folders' do
+        expect(subject).to receive(:pool_folders).and_return(configured_folders)
+        expect(provider).to receive(:purge_unconfigured_folders).with(base_folders, configured_folders, whitelist)
+        expect(provider).to receive(:provider_config).and_return({})
 
-    it 'should raise any errors' do
-      expect(subject).to receive(:pool_folders).and_return(configured_folders)
-      expect(provider).to receive(:purge_unconfigured_folders).with(base_folders, configured_folders, whitelist).and_raise('mockerror')
-      expect(provider).to receive(:provider_config).and_return({})
+        subject.purge_vms_and_folders(provider_name)
+      end
 
-      expect{ subject.purge_vms_and_folders(provider) }.to raise_error(RuntimeError, 'mockerror')
+      it 'should raise any errors' do
+        expect(subject).to receive(:pool_folders).and_return(configured_folders)
+        expect(provider).to receive(:purge_unconfigured_folders).with(base_folders, configured_folders, whitelist).and_raise('mockerror')
+        expect(provider).to receive(:provider_config).and_return({})
+
+        expect{ subject.purge_vms_and_folders(provider_name) }.to raise_error(RuntimeError, 'mockerror')
+      end
     end
   end