Fix cm nav

[noCharger]

Issues

1. After credential created, would like to return back to the credential listing page
2. After delete button clicked, would like to refresh the credential table

Attempts

1. Replace async call to Promise.resolve() on button.onClick (X)
2. Use props.history.push('') to refresh (x)
3. Use props.history.push('/') to return back (x)
4. Add onChange function to refresh the EuiInMemoryTable component (X)
5. Remove the credential items and set state (X) - the state will not changed unless page refresh
6. hapy redirected() method (x)

Comments

1. Attempt 1,2,3 were used in current index pattern management and saved object management.
2. From debugging, the page refreshed after credential created

[zengyan-amazon]

let's use async await syntax when possible to keep the code more consistent in the repo