key rotation operation creates a 2nd access key instead of rotating existing key

[blakeca00]

When key rotation is attempted on an IAM user account with only 1 existing access key:

keyup --profile williamh  --operation up

Instead of rotating the preexisting, expiring access key, keup creates a second access key

where none currently exists:

‌

[blakeca00]

Fixed issue #52 --creation of 2nd access key when attempting to rotate key for iam users with only 1 registered access key

→ <<cset ce9a5f4ed34a>>

[blakeca00]

keyup was not deleting the current access key for iam users possessing only 1 iam access key. This issue is resolved in version 1.3.