Use standard macros expansion in bp_rules output.

The limited set of expression expanded in business rules output templates is
now replaced by a standard and full macro expansion using the `MacroResolver`
class.

The common `STATUS`, `SHORTSTATUS` and `FULLNAME` macros are also added to
ease output templates writing on business rules using mixed hosts and
services.
Merge pull request #1338 from geektophe/bp_rule_tag_expansion_fix

Use standard macros expansion in bp_rules output templates