Shift qpid_proton version to 0.22.0

With this commit we shift required qpid_proton version because
0.22.0 implements heartbeating, which is essential. Without the
heartbeating, connection was being closed by ActiveMQ every 2 minutes.

See this bug report: https://issues.apache.org/jira/browse/PROTON-1806

Signed-off-by: Miha Pleško <miha.plesko@xlab.si>

Gemfile

@@ -119,7 +119,7 @@ group :nuage, :manageiq_default do
 end
 
 group :qpid_proton, :optional => true do
-  gem "qpid_proton",                    "~>0.19.0",      :require => false
+  gem "qpid_proton",                    "~>0.22.0",      :require => false
 end
 
 group :openshift, :manageiq_default do