Revert "Login with the authentication manager"

This reverts commit 1b3ed17c0b530590ca303dc2f655a49984f7bfe2.
Finish the first line of documentation with a dot for checkstyle
Enforce the 120 characters limit per line
Avoid naming properties using the constants naming style
Add @Override when needed
Fix various style issues
Add Sonar plugin
Merge branch 'master' into 2.8-ox