[intelliJ]Switch Container in refreshing statue, then could apply the invalid storage account value. #2307

Build:
azure-toolkit-for-intellij-2018.2.develop.832.10-29-2018

Repro Steps:

1. Launch one run config file
2. Enter valid storage account and key
3. Rename storage account
4. Change storage container, then click apply

Result:
The invalid storage account name is accepted. Wait for a long time, the warning message may display, but the config is accepted anyway.