fix error on serialization of metric_fu yaml report of .erb files

On Sonar Runner analysis of a Ruby project with .erb files, which
metric_fu puts in its report file the '!binary' type on the 'class_name'
and 'name' properties. The SnakeYAML library throws an error when
loading the yaml file string as a Map: see line 36 of
MetricfuComplexityYamlParserImpl class.

The fix is to replace, in the yaml file string, the string
'name: !binary' to the string 'name: tag:yaml.org,2002:binary'.
measures not saved on sonar equal or greater than 4.4

The measures of 'basic metrics' (ncloc, files, etc.), 'complexity'
and coverage are not saved on Sonar version equal or greater than
4.4 but the source files are saved. On Sonar 3.7.4 these metrics
measures are saved.

The fix is to use a org.sonar.api.resources.File as the resource
on the sensorContext.saveMeasure method. The idea came from
looking at the source of Javascript Sonar Plugin. With this the
measures are saved in Sonar 3.7.4 and Sonar 4.4 or greater.