* Align treasuremap virtual-airship-core site to recent changes of
airshipctl
* This PS takes care of only the "airship-core" type and all other
sites will fail validate docs untill the secrets are aligned.
* So the validate_docs is invoked with parameter "virtual-airship-core"
to run document validation just for virtual-airship-core
reference airshipctl commit: e2c56108eef38dd83df52fcfd1fa6844e5376a56
Change-Id: I2e6149951beca570a3cadeecbc05366325c80286