Fixed reading pending tests.

Signed off by: Diego Araújo <diegoamc90@gmail.com>
Fixed Metric Configuration pending tests.

Signed off by: Diego Araújo <diegoamc90@gmail.com>
Partial correction of the pending tests
Fixed unit tests for MetricCollector.
Removed collector_class_name attribute from MetricCollector.

Signed off by: Daniel Alves <danpaulalves@gmail.com>
version bump