Use meta/collection-requirements.yml for collection dependencies (#110)

There is no way for a role to automatically require collections for
module/plugin dependencies. Use the non-standard file
meta/collection-requirements.yml for this. Note that
meta/requirements.yml is supposed to be a list of roles only, in
the format described at https://docs.ansible.com/ansible/latest/galaxy/user_guide.html#installing-multiple-roles-from-multiple-files

[citest skip] bump tox-lsr version to 2.11.0; remove py37; add py310 (#109)

tox-lsr version 2.11.0 has support for collection-requirements.yml,
runqemu improvements, and support for python 3.10

python 3.7 is not used on any supported platform, so remove it

Signed-off-by: Rich Megginson rmeggins@redhat.com