Change chrony_role_action default to 'all'

As documented we should change the default to 'all'.
Also fixes tox-linters job.

Change-Id: I33bf616bcca62f68437a0c2520cb860194a3a203

ansible-requirements.txt

@@ -3,4 +3,4 @@
 # lint checks and want to document these as ansible specific things that may
 # be required for this repository.
 ansible<2.10
-ansible-lint
+ansible-lint<4.3.0

defaults/main.yml

@@ -1,6 +1,6 @@
 ---
 chrony_debug: False
-chrony_role_action: install
+chrony_role_action: all
 chrony_global_server_settings: iburst
 chrony_ntp_servers: []
 chrony_ntp_pools: ['pool.ntp.org']

setup.py

@@ -16,4 +16,5 @@ import setuptools
 
 setuptools.setup(
     setup_requires=['pbr'],
+    py_modules=[],
     pbr=True)