Salt GPG issue

secrets.sls contains the GPG encrypted value for `%{$secret`:

----- BEGIN secrets.sls -----
#!yaml|gpg

# Example only, not really used for anything
mysql-password: |
  -----BEGIN PGP MESSAGE-----
  Version: GnuPG v2.0.22 (GNU/Linux)

  hQEMA29Acv9q22PUAQf/dDoQejobvSOoLtkeOS7fxGkK+EHmP/d3B2YEhctvcRR/
  yx34b9vfdrzgMiCUCpb1qqw9Wr+0zZ25/xDHs9FvOkiNSLw9TxjZV0FDh6t8ykTq
  2Jh6t/islVFDSgA0MgZ04gmQs44kpYx2G/2fvCbcpdf6c8+Cz9fIJTiqQp4aGs0e
  Ss9IrjXRucyvlPtLtd3CcMic+anj/eM3TWV6PUX9kNvwsdK+2d1Nk+7BVRXyuhXs
  ngovz7xGHNdQAOsdKHo2QdPk8ERoG1fDj/NzhIlp6uzAqgye7XBHDY8On+9Em2hy
  /IlO5y6hsdJ4clc78cmIXT3EPX/AiKwhOhU4zYuWptI9AUJzEpMxLEr28RDJ+F1+
  Msg/keXVXe/Mm6okuLG2akbXjvkTNgF30hCU/do3uRx/EYM6BuT4jYr3FWESuw==
  =Hnvr
  -----END PGP MESSAGE-----
----- END secrets.sls -----


# salt-call pillar.get mysql-password
local:
    %{