Removing heat:server:stack_domain_admin:domain

The parameter heat:server:stack_domain_admin:domain has been
removed from reclass due to the fact that it is not used and not
processes by the formula. According to above the parameter has
been deleted as unused and confusing.

Change-Id: I659e3e97c80b9967b5d7b560fd41a938659dba93
Related-PROD: PROD-25486
(cherry picked from commit b3c68694b6cdb614c80aae071da19351eb2810f2)
2 files changed