Add formats for MC Reco steps
add dataset list textarea
VOMS interface changed to take all options only from parameters given. Method 'get_identity_options' fixed to have
no potential side effects on environment variables.
Initialize VOMS interface with options from setting s only.
PAckage 'python-requests' added to dependencies (needed for DEFT API)
Removed middleware file (not needed anymore).
Settings files changed to enable authentication backends
Merge branch 'sbelov_sso-voms-v2' of https://github.com/PanDAWMS/panda-bigmon-atlas into sbelov_sso-voms-v2