Write failing scenario for orphan inactivation while sponsored
Create failing orphan inactivation specs; implement Orphan methods that validate inactivation. https://osraav.atlassian.net/browse/OSRA-185
Rebase & fix failing scenario
Merge pull request #116 from NikitaAvvakumov/validate_orphan_inactivation

Validate orphan inactivation
OSRA-116 #resolve
Create failing scenario for placing sponsoring sponsor on hold
Create failing spec for placing sponsoring sponsor on hold
Amend Sponsor#being_inactivated? to allow placing sponsoring sponsor on hold