Object name escaping in `JMXReporter` doesn't cover tags

Current 5.x releases (5.0.8 at time I am reporting this) don't escape tags when generating ObjectName for JMX. Invalid tag name will break ObjectName construction, while an invalid tag value will fail at a later time.

There are also two smaller issues:

• tags can override name and type
• domain is quoted but it doesn't suport quoting, an illegal character will always result in NPE (for : or \n) or an unregistrable pattern (*or?`)