clipp_test: Adding helper configuration values for loading Lua config and module files.
Waggle rules must tell the rule engine to pre-populate FIELD_NAME and related fields.
Moving a lua test to a lua test file.
Require the Waggle rule author to enable the rule meta flags.

This is done using the Waggle rule function set_rule_meta_fields().
For example:
    Rule("my_rule", "1"):
        fields('REQUEST_HEADERS'):
        op('!rx', '^$'):
        phase('REQUEST_HEADER'):
        set_rule_meta_fields():
        action('setvar:X=%{FIELD_NAME}')