Drop testing of digitalocean, hetznercloud, lxd and openstack plugins

* Fixes plugin testing pipeline by removing unmaintained plugins
  which affected it and upgrading dependencies for maintained ones.

tox.ini

@@ -88,7 +88,6 @@ setenv =
   {[testenv]setenv}
   # without his upgrade would likely not do anything
   PIP_CONSTRAINT = /dev/null
-extras =
 skip_install = true
 usedevelop = false
 
@@ -180,23 +179,26 @@ commands =
 [testenv:eco]
 description = Smoketest of combining all known to be maintained plugins (ecosystem)
 pip_pre = true
-extras =
-    # we install test extra in order to validate it does not drag ansible in
-    test
 deps =
+    # we install test extra in order to validate it does not drag ansible in
+    --editable .[test]
     ansible-core >= 2.11
     molecule-azure >= 0.5.0
-    molecule-containers >= 1.0.1
+    molecule-containers >= 1.0.2
     # molecule-digitalocean >= 0.1  # removed on 2021-11-26 (unmaintained)
+    # https://github.com/ansible-community/molecule-digitalocean/issues/3
     molecule-docker >= 1.0.2
-    molecule-ec2 >= 0.3
-    molecule-gce >= 0.2
-    molecule-hetznercloud >= 1.3.0
-    molecule-libvirt >= 0.0.3
-    molecule-lxd >= 0.2
-    molecule-openstack >= 0.3
+    molecule-ec2 >= 0.4
+    molecule-gce >= 0.3.1
+    # molecule-hetznercloud >= 1.3.0  # removed on 2021-12-02 (unmaintained)
+    # https://github.com/ansible-community/molecule-hetznercloud/issues/43
+    molecule-libvirt >= 0.0.5
+    # molecule-lxd >= 0.2  # removed on 2021-12-02 (unmaintained)
+    # https://github.com/ansible-community/molecule-lxd/issues/1
+    # molecule-openstack >= 0.3  # removed on 2021-12-02 (unmaintained)
+    # https://github.com/ansible-community/molecule-openstack/issues/1
     molecule-podman >= 1.0.1
-    molecule-vagrant >= 0.6.1
+    molecule-vagrant >= 1.0.0
     tox-ansible >= 1.5.1
     pipdeptree >= 2.0.0
 commands =