add some Tower module integration tests (and fix a bug or two) (#37421)

* add additional test coverage for tower modules

* add test coverage for the tower_credential module

* add test coverage for the tower_user module

* fix a bug in py3 for tower_credential when ssh_key_data is specified

* add test coverage for tower_host, tower_label, and tower_project

* add test coverage for tower_inventory and tower_job_template

* add more test coverage for tower modules

- tower_job_launch
- tower_job_list
- tower_job_wait
- tower_job_cancel

* add a check mode/version assertion for tower module integration tests

* add test coverage for the tower_role module

* add test coverage for the tower_group module

* add more integration test edge cases for various tower modules

* give the job_wait module more time before failing

* randomize passwords in the tower_user and tower_group tests

test/integration/targets/tower_project/aliases

@@ -0,0 +1,2 @@
+cloud/tower
+posix/ci/cloud/group4/tower

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

@@ -0,0 +1,27 @@
+- name: Create an SCM Credential
+  tower_credential:
+    name: SCM Credential for Project
+    organization: Default
+    kind: scm
+
+- name: Create a Project
+  tower_project:
+    name: my-project
+    organization: Default
+    state: present
+    scm_credential: SCM Credential for Project
+  register: result
+
+- assert:
+    that:
+      - "result is changed"
+
+- name: Delete a Project
+  tower_project:
+    name: my-project
+    state: absent
+  register: result
+
+- assert:
+    that:
+      - "result is changed"