Removing code of metric_configuration params.

Kalibro does not use this attribute.

Signed off by: Rafael Reggiani Manzo <rr.manzo@gmail.com>
Setting aggregation form for coumpund metric configuration.

Signed off by: Rafael Reggiani Manzo <rr.manzo@gmail.com>
Merge pull request #3 from mezuro/fixed_compound_metric_configuration_creation

Setting aggregation form for coumpund metric configuration.
Merge pull request #2 from mezuro/metric_configuration_code_field

Removing code of metric_configuration params.