bwrap/runner: Add /etc/ssh in bind mounted folder

/etc/ssh is currently not bound when run into bwrap, this leads to
error like "Bad owner or permissions on /etc/ssh/ssh_config.d/05-redhat.conf"
since it cannot access this file.

https://github.com/ansible/awx/pull/3391 was done pre runner
integration.

Fixes: https://github.com/ansible/awx/issues/3392

Signed-off-by: Yanis Guenane <yanis@guenane.org>

awx/main/tasks.py

@@ -818,6 +818,7 @@ class BaseTask(object):
                 'process_isolation_hide_paths': [
                     settings.AWX_PROOT_BASE_PATH,
                     '/etc/tower',
+                    '/etc/ssh',
                     '/var/lib/awx',
                     '/var/log',
                     settings.PROJECTS_ROOT,

awx/main/tests/unit/test_tasks.py

@@ -452,6 +452,7 @@ class TestGenericRun():
 
         for p in [settings.AWX_PROOT_BASE_PATH,
                   '/etc/tower',
+                  '/etc/ssh',
                   '/var/lib/awx',
                   '/var/log',
                   settings.PROJECTS_ROOT,