Bugfix: correct variable name  to
IMPROVEMENT: remove generated password from import failure data
MINOR: comment spelling corrections
Improvements to facilitate unit testing
- don't die at end of _export()
- internal classs wrapper method for is_uploaded_file() to allow
  overriding for use under cli & without having to upload a file
Add unit tests for usermanager import & export functions
test import against auth plugin which doesn't allow adding users
Per FS#2884, implement a local version of str_getcsv() to maintain
compatibility with php 5.2.x (str_getcsv() is only available in
php 5.3+ and is used by user manager import feature.
comment (hide) incomplete export with filter test
remove incorrect 'private' restriction from tset method
Merge pull request #455 from splitbrain/user_importexport_fixes

Usermanager import/export fixes