Remove note about 1.12.4 not being compatible with pipelines
Remove note about 1.12.4 not being compatible with pipelines

Also adds OpenStack to matrix
sandyg1/pcf-pipelines,pvsone/pcf-pipelines,pivotal-cf/pcf-pipelines,rahulkj/pcf-pipelines,rahulkj/pcf-pipelines,cah-josephgeorge/pcf-pipelines,mcb/pcf-pipelines,sandyg1/pcf-pipelines,pivotal-cf/pcf-pipelines,sandyg1/pcf-pipelines,mcb/pcf-pipelines,pvsone/pcf-pipelines,cah-josephgeorge/pcf-pipelines,pivotal-cf/pcf-pipelines,cah-josephgeorge/pcf-pipelines,mcb/pcf-pipelines,rahulkj/pcf-pipelines,pvsone/pcf-pipelines,rahulkj/pcf-pipelines,sandyg1/pcf-pipelines,pivotal-cf/pcf-pipelines