revert python3 setup + add TODO; python3 tests aren't working now but python2 is EOL so they should work soon

.ci/azure-pipelines-steps.yml

@@ -17,6 +17,8 @@ steps:
     # need wheel before building virtualenv because of bdist_wheel and setuptools deps
     # Mac's System Integrity Protection prevents symlinking /usr/bin
     # and Azure isn't allowing disabling it apparently: https://developercommunityapi.westus.cloudapp.azure.com/idea/558702/allow-disabling-sip-on-microsoft-hosted-macos-agen.html
+    # the || will activate when running python3 tests
+    # TODO: get python3 tests passing
     (sudo ln -fs /usr/bin/python$(python.version) /usr/bin/python &&
       /usr/bin/python -m pip install -U pip wheel setuptools &&
       /usr/bin/python -m pip install -U virtualenv &&

.ci/azure-pipelines.yml

@@ -15,8 +15,8 @@ jobs:
       Mito27_27:
         python.version: '2.7'
         MODE: mitogen
-      Ans288_37:
-        python.version: '3'
+      Ans288_27:
+        python.version: '2.7'
         MODE: localhost_ansible
         VER: 2.8.8
 

tests/ansible/lib/modules/custom_python_detect_environment.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python
 # I am an Ansible new-style Python module. I return details about the Python
 # interpreter I run within.
 

tests/ansible/regression/issue_152__virtualenv_python_fails.yml

@@ -15,27 +15,15 @@
         no_proxy: "{{ lookup('env', 'no_proxy')|default('') }}"
         PATH: "{{ lookup('env', 'PATH') }}"
 
-    - name: set python interpreter because mac symlinks things and complains
-      block:
-        - name: set python3 interpreter
-          when: lout.python_version.startswith('3')
-          set_fact:
-            python_interpreter: /tmp/issue_152_virtualenv/bin/python3
-
-        - name: set python2 interpreter
-          when: lout.python_version.startswith('2')
-          set_fact:
-            python_interpreter: /tmp/issue_152_virtualenv/bin/python
-
     - custom_python_detect_environment:
       vars:
-        ansible_python_interpreter: "{{ python_interpreter }}"
+        ansible_python_interpreter: /tmp/issue_152_virtualenv/bin/python
       register: out
       when: lout.python_version > '2.6'
 
     - assert:
         that:
-          - out.sys_executable == "{{ python_interpreter }}"
+          - out.sys_executable == /tmp/issue_152_virtualenv/bin/python
       when: lout.python_version > '2.6'
 
     - file: