Make graphite path wildcards work

[sukhwinder33445]

resolves #220

[sukhwinder33445]

Tests:

Tested with the users.ini file. Changed the [users.metrics_filters] for tests.

✅ users = "$service_name_template$.perfdata.us[a-z]rs.value"
✅ users = "$service_name_template$.perfdata.u[sd]ers.value"
✅ users = "$service_name_template$.perfdata.{uders,users,umers}.value"
✅ users = "$service_name_template$.perfdata.us*rs.value"
✅ users = "$service_name_template$.perfdata.us*rs.va*"
✅ users = "$service_name_template$.perfdata.*.va*"

[sukhwinder33445]

Tests:

Tested with the disk.ini file. Changed the [users.metrics_filters] for tests.

✅ value = "$service_name_template$.perfdata.$disk:{_etc_hostname,_data}$.value"
✅ value = "$service_name_template$.perfdata.$disk:{_etc*,_data}$.value"
✅ value = "$service_name_template$.perfdata.$disk:{_et[abc]_hostname,_data}$.value"
✅ value = "$service_name_template$.perfdata.$disk$.value"