v7.0: Support CFME 5.10 retirement tasks (#51)

• Support CFME retirement tasks present in v5.10 and better
• Utilize library from miq-Utilities
  • https://github.com/RedHatOfficial/miq-Utilities

v6.4: During cleanup, do not overwrite $evm.root['vm'] with nil

Do not overwrite $evm.root['vm'] when cleaning up after $evm.instantiate

v6.3

Refactor to account for custom attributes not working with spaces or colons.

v6.2: Do not store keys as symbols

Store keys as strings instead of symbols in $evm.root

v6.1

Removed typo that was causing errors

v6.0

Purpose

Resolve issues with marshaling and un-marshaling objects.

Changes

See Milestone v6.0.

v5.0

Purpose

Add ability to edit LDAP entry for a single VM.

Changes

See Milestone 5.0

v4.2

Purpose

Minor enhancement.

Changes

See Milestone 4.2

v4.1

Purpose

Bug fixes.

Changes

See Milestone 4.1

v4.0

Purpose

Enhancements.

Changes

See Milestone 4.0

Enhancements

• cache emails
• add ability to update LDAP on retirement
• add retry to add LDAP entry