Add back some missing state transitions to VmScan

[agrare]

Some of the state transitions on error conditions were removed during the prior VmScan refactoring, specifically scan_retry which is called here and abort_retry which is called here

[miq-bot]

Checked commit agrare@a987cd9 with ruby 2.5.5, rubocop 0.69.0, haml-lint 0.20.0, and yamllint 1.10.0
1 file checked, 2 offenses detected

app/models/vm_scan.rb

• ❗ - Line 29, Col 7 - Layout/AlignHash - Align the elements of a hash literal if they span more than one line.
• ❗ - Line 30, Col 7 - Layout/AlignHash - Align the elements of a hash literal if they span more than one line.