Use python interpreter

Author: UnderGreen

tests/hosts

@@ -1,13 +1,13 @@
 [local]
-localhost	ansible_connection=local ansible_python_interpreter=python2
+localhost	ansible_connection=local ansible_python_interpreter=python
 
 [mongo_master]
-mongo1		ansible_connection=docker ansible_user=root ansible_python_interpreter=python2
+mongo1		ansible_connection=docker ansible_user=root ansible_python_interpreter=python
 
 [mongo_replicas]
-mongo2		ansible_connection=docker ansible_user=root ansible_python_interpreter=python2
-mongo3		ansible_connection=docker ansible_user=root ansible_python_interpreter=python2
+mongo2		ansible_connection=docker ansible_user=root ansible_python_interpreter=python
+mongo3		ansible_connection=docker ansible_user=root ansible_python_interpreter=python
 
 [mongo:children]
 mongo_master
-mongo_replicas
+mongo_replicas