Reverted commit 1f3417cd [1] which disabled check-import.sh script.
Python module galaxy_importer will return a non-zero return value on
errors since commit 4f5fd0f29c [2].

Use galaxy-importer 0.3.1 for Ansible 2.9 and galaxy-importer 0.3.2
for later Ansible releases because galaxy-importer moved from ansible
2.9 to ansible-core 2.11 in 0.3.2 [3].

Ref.:
[1] https://opendev.org/openstack/ansible-collections-openstack/commit/1f3417cdef4b55fa6cfb241815a2531358fa286f
[2] https://github.com/ansible/galaxy-importer/commit/4f5fd0f29c30c354cd92837ac71109abc0b48082
[3] https://github.com/ansible/galaxy-importer/commit/98933547831922c45243f39d85eefe150b55fc36

Change-Id: I898149727d80cd7effe6a04ca77a13ef1774e781