AWS credential verification slow

[ilveroluca]

When creating a deployment on AWS, I click "Next" after inserting my credentials in the "Please insert your Cloud Provider credentials" page. There is a noticeable lag before the portal advances to the next page. Moreover, if one clicks "next" again before the next page is presented, the portal will practically skip over the "Setup your Cloud instances" page using default values and go to the third page of the procedure.