Quarantine failing ssh key tests

qa/qa/specs/features/browser_ui/ee_geo/ssh_push_spec.rb

 # frozen_string_literal: true
 
 module QA
-  context 'Geo', :orchestrated, :geo do
+  # Failure issue: https://gitlab.com/gitlab-org/quality/nightly/issues/84
+  context 'Geo', :orchestrated, :geo, :quarantine do
     describe 'GitLab SSH push' do
       let(:file_name) { 'README.md' }
 

qa/qa/specs/features/browser_ui/ee_geo/ssh_push_to_secondary_spec.rb

 # frozen_string_literal: true
 
 module QA
-  context 'Geo', :orchestrated, :geo do
+  # Failure issue: https://gitlab.com/gitlab-org/quality/nightly/issues/84
+  context 'Geo', :orchestrated, :geo, :quarantine do
     describe 'GitLab SSH push to secondary' do
       let(:file_content_primary) { 'This is a Geo project!  Commit from primary.' }
       let(:file_content_secondary) { 'This is a Geo project!  Commit from secondary.' }