Fix unit test relative imports, and permissions for included collection requirements (#29)

* Fix Hetzner firewall unit test imports.

* Make sure tests can actually access collections.

* Fix more relative imports.

* Fix more relative imports.

* Fix more includes.

* Fix more tests.

* One more.

* Fix syntax error in sanity import tests (invalid escape sequence "\$" caused by non-raw docs block)

* Fix permissions of ansible-test parts for sanity tests.

* Revert "Fix permissions of ansible-test parts for sanity tests."

This reverts commit c2713f0a12.

tests/unit/modules/cloud/google/test_gcp_forwarding_rule.py

@@ -1,6 +1,6 @@
 import unittest
 
-from ansible_collections.community.general.plugins.modules.cloud.google._gcp_forwarding_rule import _build_global_forwarding_rule_dict
+from ansible_collections.community.general.plugins.modules.cloud.google.gcp_forwarding_rule import _build_global_forwarding_rule_dict
 
 
 class TestGCPFowardingRule(unittest.TestCase):

tests/unit/modules/cloud/google/test_gcp_url_map.py

@@ -1,6 +1,6 @@
 import unittest
 
-from ansible_collections.community.general.plugins.modules.cloud.google._gcp_url_map import _build_path_matchers, _build_url_map_dict
+from ansible_collections.community.general.plugins.modules.cloud.google.gcp_url_map import _build_path_matchers, _build_url_map_dict
 
 
 class TestGCPUrlMap(unittest.TestCase):

tests/unit/modules/cloud/xenserver/test_xenserver_guest_info.py

@@ -10,7 +10,7 @@ __metaclass__ = type
 import json
 import pytest
 
-from ..common import fake_xenapi_ref
+from .common import fake_xenapi_ref
 
 pytestmark = pytest.mark.usefixtures('patch_ansible_module')
 

tests/unit/modules/cloud/xenserver/test_xenserver_guest_powerstate.py

@@ -10,7 +10,7 @@ __metaclass__ = type
 import json
 import pytest
 
-from ..common import fake_xenapi_ref
+from .common import fake_xenapi_ref
 
 
 testcase_set_powerstate = {