rename metrics to AllCaps format

[yegor256]

Let's make a test that will check that all metrics in the metrics/ directory produce metric names that match this regexp: ^([A-Z][A-Za-z]*)+$. Also, we will have to rename many metrics.

[MoromugHSE]

@yegor256 some metrics we are getting from jPeek are suffixed with "-cvc" to explain that they are measured differently from the original ones -- do we have to rename them? Or would it be better to include that suffix in the regexp and leave them as-is?

[yegor256]

@MoromugHSE I suggest we rename them to LCOM5c, etc.