Add to tempest conf new variable

Reguister new variable barbican_integration_enabled in
tempest config -> compute_feature_enabled section

Related-prod: PRODX-4874

Change-Id: I419b055e5224f498f3c4082bfd88de25a7354ff4
(cherry picked from commit e7a4336bd28d304e4001a3d9e17da4aa3eabacdc)
(cherry picked from commit 046540f59f31a365fcffe20900e3c6c4deab553b)
(cherry picked from commit f0a0b1b212d453c312caf249184e6fdee7fe67bc)
(cherry picked from commit bfa18c20b98c589bdeaee361dd0d481d98953f17)
(cherry picked from commit 4014c9064f7819797b1c1e2d957d36778d3cc525)
1 file changed