Make module generator use add_moduleinfo

Function add_moduleinfo() was created after the module generators.

Now module generators need to be changed to use it in order to:

• Properly use API. At the moment there is a wrong sequence in creating module and adding it to the section which already resulted in course cache not being reset when it is supposed to so that assign generator is now hacked to explicitly clear course cache.
• Allow generate modules with conditional availability and completion info
• This will allow to add new module generators much easier

Also in this issue added generators for modules: glossary, lesson, survey, url, wiki, workshop, created an issue (linked) for remaining modules