Cleanup LdapSource

[ctgraham]

• Add missing method documentation
• Remove invalid use of error control operators on ldap_* calls
• initialize missing variables: $this->_queriesCnt and $this->_queriesLog
• remove unused variables: $this->_queriesLogMax from logQuery() and $i from _mergeAssociation()
• correct variable naming typos: $hasFailover/$hasFailOver and $this->SchemaFilter/$schemaFilter
• add 'fields' parameter when generating associations
• correct PHPDoc use of integer and boolean to int and bool.
• correct PHPDoc use of initial capitalization in params and returns.
• correct inconsistent use of $this->results vs. $this->_result.

[rchavik]

Nice. Especially the removals of @

:+1:

[jadb]

I think this is good to go. Could you squash the commits, they are all about cleaning up.