dependency resolvers conf sample file will disappear in 21.09

[cat-bro]

this file will disappear from galaxy, it needs to be copied to files/galaxy/config in this repo
https://github.com/galaxyproject/galaxy/blob/release_21.05/lib/galaxy/config/sample/dependency_resolvers_conf.xml.sample

[cat-bro]

or it can be a variable in galaxy_config.galaxy

default is

galaxy:
  dependency_resolvers:
    - type: tool_shed_packages
    - type: galaxy_packages
    - type: conda
    - type: galaxy_packages
      versionless: true
    - type: conda
      versionless: true

https://docs.galaxyproject.org/en/master/admin/dependency_resolvers.html

[Slugger70]

I like the idea of moving it to galaxy.yml though it is becoming a bit monlithic.

[cat-bro]

#537