Update plexus-container-default to 1.5.5

Some unit tests used deprecated API which was removed in later
versions of plexus-container-default.
Merge pull request #3 from mizdebsk/plexus-container-1.5.5

Update plexus-container-default to 1.5.5
Thanks !
[MODELLO-269] fixed source Web Access link to match Github pattern
[MODELLO-268] ensure features site has been generated, to be published
alongside the plugin site
fixed typo (thanks to Michael Osipov for the report)
defined version for maven-verifier-plugin