Fix lookup_passwordstore test skipping. (#49178)

* Fix lookup_passwordstore test skipping.

Skip all of RHEL instead of specific versions.
Skip all of CentOS < 7 instead of specific versions.

This makes the test more robust when testing newer versions.

Tests could be executed on RHEL if EPEL was installed during the test.

test/integration/targets/lookup_passwordstore/aliases

@@ -1,3 +1,3 @@
 shippable/posix/group2
 destructive
-skip/rhel8.0
+skip/rhel

test/integration/targets/lookup_passwordstore/tasks/main.yml

@@ -1,4 +1,6 @@
+- block:
     - include: "package.yml"
-  when: "ansible_distribution_version not in passwordstore_skip_os.get(ansible_distribution, [])"
     - include: "tests.yml"
-  when: "ansible_distribution_version not in passwordstore_skip_os.get(ansible_distribution, [])"
+  when:
+    - not (ansible_distribution == 'RedHat')  # requires EPEL
+    - not (ansible_distribution == 'CentOS' and ansible_distribution_version is version_compare('7', '<'))

test/integration/targets/lookup_passwordstore/vars/main.yml

@@ -56,7 +56,3 @@ passwordstore_privkey: |
   SxHTvI2pKk+gx0FB8wWhd/CocAHJpx9oNUs/7A==
   =ZF3O
   -----END PGP PRIVATE KEY BLOCK-----
-passwordstore_skip_os:
-  Ubuntu: ['12.04']
-  RedHat: ['7.4']
-  CentOS: ['6.9', '6.10']