do not ignore attributes
Fix white space

* @miketheman also pointed out that indentation was incorrect
fix indent bug in jmx.yaml.erb, add test
make name, username and password optional for jmx
allow arbitrary keys in jmx instances
Merge branch 'fix-jmx-attributes' of https://github.com/flah00/chef-datadog into flah00-fix-jmx-attributes
Merge branch 'fix-jmx-yaml' into jmx_template

Merging changes from @flah00 and @clofresh to get the added tests,
better indentation, handling of arbitrary keys.

Conflicts:
	templates/default/jmx.yaml.erb