Remove violation log link from subaccounts

Subaccounts can't access the violation log so they shouldn't show
the button to see them.

Test Plan:
  - Enable CSP feature flag in Canvas
  - Go to /accounts/XX/settings and click on the security
    tab
  - You should see View Violation Log option
  - Go to a subaccount (creating one if needed)
  - Go to the settings for that subaccount and go to the
    security tab
  - You should not see the View Violation Log option

closes USERS-150

flag = javascript_csp

Change-Id: Icd837bd0b516fe92b4eb309f97b0b3fcfadba30e
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/218335
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Tested-by: Jenkins
Reviewed-by: Charley Kline <ckline@instructure.com>
QA-Review: Steve Shepherd <sshepherd@instructure.com>
Product-Review: Clay Diffrient <cdiffrient@instructure.com>

app/jsx/account_settings/components/Whitelist.js

@@ -156,11 +156,13 @@ export class Whitelist extends Component {
                     })}
               </Heading>
             </Flex.Item>
+            {!this.props.isSubAccount && (
               <Flex.Item>
                 <Button variant="link" onClick={() => this.setState({showViolationTray: true})}>
                   {I18n.t('View Violation Log')}
                 </Button>
               </Flex.Item>
+            )}
           </Flex>
         </View>
 

app/jsx/account_settings/components/__tests__/Whitelist.test.js

@@ -375,4 +375,14 @@ describe('ConnectedWhitelist', () => {
       expect(button).toBeDisabled()
     })
   })
+
+  describe('isSubAccount', () => {
+    it('does not show the option to view a violation log', () => {
+      const {queryByText} = renderWithRedux(
+        <ConnectedWhitelist context="account" contextId="1" maxDomains={50} isSubAccount />
+      )
+      const violationLogBtn = queryByText('View Violation Log')
+      expect(violationLogBtn).toBeNull()
+    })
+  })
 })