Add number of metrics analyzer

[timur-harin]

@yegor256 In this PR, I added:

• Complex Java class to check number of metrics
• Check that number is equivalent with number of metrics of simple Java class Foo

Now the result of sudo make test TEST=tests/steps/test-measure-file.sh

steps/test-measure-file.sh:
👍🏻 Single file measured correctly
👍🏻 Broken syntax measured and error log created
👍🏻 Complex file measured correctly
👍🏻 Number of metrics matches for simple and complex Java files: 62 metrics