SONAR-5546 fix typo in ruby code
Fix some quality flaws
SONAR-5484 Fix test on windows
Fix minor quality flaw
Add unit test coverage
fix Ignored test and removed another one
Merge branch 'master' into SONAR-5529

Conflicts:
	server/sonar-server/src/test/java/org/sonar/server/issue/db/IssueBackendMediumTest.java
Merge branch 'SONAR-5529' of github.com:SonarSource/sonarqube into SONAR-5529