Change provision from vmpooler to abs

Author: Daniel Carabas

provision.yaml

@@ -18,5 +18,5 @@ travis_el7:
   provisioner: docker 
   images: ['litmusimage/centos:7', 'litmusimage/oraclelinux:7', 'litmusimage/scientificlinux:7']
 release_checks:
-  provisioner: vmpooler
+  provisioner: abs
   images: ['redhat-5-x86_64', 'redhat-6-x86_64', 'redhat-7-x86_64', 'redhat-8-x86_64', 'centos-5-x86_64', 'centos-6-x86_64', 'centos-7-x86_64', 'centos-8-x86_64', 'oracle-5-x86_64', 'oracle-6-x86_64', 'oracle-7-x86_64', 'scientific-6-x86_64', 'scientific-7-x86_64', 'debian-8-x86_64', 'debian-9-x86_64', 'ubuntu-1404-x86_64', 'ubuntu-1604-x86_64', 'ubuntu-1804-x86_64', 'win-2008r2-x86_64', 'win-2012r2-x86_64', 'win-2016-x86_64', 'win-10-pro-x86_64']