don't set global executable...

tests/ansible/ansible.cfg

@@ -13,7 +13,6 @@ module_utils = lib/module_utils
 retry_files_enabled = False
 display_args_to_stdout = True
 forks = 100
-executable = /bin/bash
 
 # We use lots of deprecated functionality to support older versions.
 deprecation_warnings = False

tests/ansible/integration/interpreter_discovery/complex_args.yml

@@ -25,6 +25,8 @@
       environment:
         https_proxy: "{{ lookup('env', 'https_proxy')|default('') }}"
         no_proxy: "{{ lookup('env', 'no_proxy')|default('') }}"
+      args:
+        executable: "/bin/bash"
 
     - name: run get_url with specially-sourced python including jinja
       get_url:
@@ -41,3 +43,5 @@
       environment:
         https_proxy: "{{ lookup('env', 'https_proxy')|default('') }}"
         no_proxy: "{{ lookup('env', 'no_proxy')|default('') }}"
+      args:
+        executable: "/bin/bash"