Add lower ansible-runner version as requirements for train

In order to be supported by train, we need to have a lower
version of ansible runner

Change-Id: Ibda46fbb42f77a3a55243539721557a4e95f93ff

lower-constraints.txt

@@ -1,7 +1,7 @@
 alabaster==0.7.10
 ansible-lint==3.4.21
 ansible==2.4.3.0
-ansible-runner==1.4.4
+ansible-runner==1.3.4
 anyjson==0.3.3
 appdirs==1.4.3
 asn1crypto==0.24.0

requirements.txt

@@ -5,4 +5,4 @@
 pbr>=3.1.1 # Apache-2.0
 six>=1.11.0 # MIT
 PyYAML>=3.12 # MIT
-ansible-runner>=1.4.4 # Apache-2.0
+ansible-runner>=1.3.4 # Apache-2.0