Events can explicitly set tags 

After #589 was merged portertech suggested an appropriate change to guard against concat'ing a non array object.
add fluentd/check_fluentd_monitor_agent.rb
Fix rubocop issue on master
Merge pull request #600 from sensu/review_140530_fix_master

Fix rubocop issue on master
rename check_fluentd_monitor_agent.rb => check-fluentd-monitor-agent.rb
fix url
Merge pull request #599 from someword/patch-2

Events can explicitly set tags
add header
fix permission 644 => 755
Merge pull request #601 from kenjiskywalker/add_check_fluentd_monitor_agent

add check-fluentd-monitor-agent.rb