tests: split out ansible_tests requirements

Also remove hard-coded Ansible version, the tests don't need it, nor
does local testing most of the time

.travis/ansible_tests.py

@@ -34,6 +34,7 @@ with ci_lib.Fold('job_setup'):
     os.chdir(TESTS_DIR)
     os.chmod('../data/docker/mitogen__has_sudo_pubkey.key', int('0600', 7))
 
+    run("pip install -qr requirements.txt")  # tests/ansible/requirements
     # Don't set -U as that will upgrade Paramiko to a non-2.6 compatible version.
     run("pip install -q ansible==%s", ci_lib.ANSIBLE_VERSION)
 

dev_requirements.txt

@@ -1,10 +1,8 @@
 -r docs/docs-requirements.txt
-ansible==2.6.1
 coverage==4.5.1
 Django==1.6.11  # Last version supporting 2.6.
 mock==2.0.0
 pytz==2018.5
-paramiko==2.3.2  # Last 2.6-compat version.
 cffi==1.11.2  # Random pin to try and fix pyparser==2.18 not having effect
 pycparser==2.18  # Last version supporting 2.6.
 pytest-catchlog==1.2.2
@@ -16,4 +14,3 @@ unittest2==1.1.0
 # Fix InsecurePlatformWarning while creating py26 tox environment
 # https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
 urllib3[secure]; python_version < '2.7.9'
-google-api-python-client==1.6.5

tests/ansible/requirements.txt

@@ -0,0 +1,2 @@
+paramiko==2.3.2  # Last 2.6-compat version.
+google-api-python-client==1.6.5