Private Cluster openshift 3.11 :: Master cluster hostname

[aiphone71]

Describe the bug
fro deploying Private cluster of openshift 3.11 in azure stack
create.yml under ansible folder does not pass parameters related to private master even after setting parameters in Azure parameter json file.

Which is expected in deployscript file

export PRIVATEIP=${31}
export PRIVATEDNS=${32}
export MASTERPIPNAME=${33}
export ROUTERCLUSTERTYPE=${34}
export INFRAPIPNAME=${35}
export CUSTOMROUTINGCERTTYPE=${36}
export CUSTOMMASTERCERTTYPE=${37}
export MINORVERSION=${38}
export BASTION=$(hostname)

Hence we get error that openshift_master_cluster_hostname must be set .

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stdout
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