Changed Share Object logic to use Access Keys

[bexsoft]

fixes #922

What does this do?

Changed Share Object Logic to use access keys instead of console login key. This is first step for this new change, as second phase we will auto generate auto expiring service accounts

How does it look?

Before:

After:

[cesnietor]

Could we add something like An Access Key with privileges for current user is required to sign this URL (adding the for current user) or something like that? Just to be clear that even being an admin won't list other service accounts (made me think that).

[cesnietor]

I found that selecting 0 days, 0 hours, and 0 minutes hangs the UI.

[cesnietor]

Tested, LTM.
It now gives the option to list user's service accounts or use other one by just typing it.

Also shows a validation error if 0 days, 0 minutes and 0 minutes

[grubjack]

trying to share a file under LDAP user with consoleAdmin permissions and get the error:

{"Code":"XMinioAdminNoSuchUser","Message":"The specified user does not exist. (Specified user does not exist)","Resource":"/minio/admin/v3/list-service-accounts","RequestId":"176498EB2822B945","HostId":"dd90..."}

under regular LDAP user get the error:

{"Code":"AccessDenied","Message":"Access Denied.","Resource":"/minio/admin/v3/list-service-accounts","RequestId":"176498F6A04CC8B9","HostId":"dd90..."}