[conda] Appended the test requirements to meta.yaml

[conda] Appeded gridtk as test requirement
6 jobs for conda-test-requirement in 49 minutes and 51 seconds (queued for 21 minutes and 3 seconds)
Status Job ID Name Coverage
  Build
passed #122025
docker
build_linux_27

00:21:42

62.0%
passed #122026
docker
build_linux_36

00:21:28

62.0%
passed #121990
macosx
build_macosx_27

00:26:30

62.0%
passed #121991
macosx
build_macosx_36

00:22:13

62.0%
failed #121988
docker
build_linux_27

00:36:57

62.0%
failed #121989
docker
build_linux_36

00:35:57

62.0%