[supervisord] Fix test on service checks (#706)
[supervisord] Fix test on service checks (#706)

Some service check fields are not necessarily in the dict anymore, so
stop assuming they are.
itsuugo/integrations-core,varlib1/servermall,serverdensity/sd-agent-core-plugins,s-maj/integrations-core,varlib1/servermall,serverdensity/sd-agent-core-plugins,serverdensity/sd-agent-core-plugins,DataDog/integrations-core,DataDog/integrations-core,varlib1/servermall,DataDog/integrations-core,s-maj/integrations-core,varlib1/servermall,DataDog/integrations-core,itsuugo/integrations-core,s-maj/integrations-core,DataDog/integrations-core,DataDog/integrations-core,serverdensity/sd-agent-core-plugins,serverdensity/sd-agent-core-plugins,DataDog/integrations-core,itsuugo/integrations-core,s-maj/integrations-core,DataDog/integrations-core,itsuugo/integrations-core,DataDog/integrations-core,DataDog/integrations-core,varlib1/servermall,itsuugo/integrations-core,s-maj/integrations-core