BibCirculation: library creation and other fixes

• Fixes a bug due to wrong argument washing name, indeed req argument name is lib_type, while argument name was type. (closes #2550)

• Cleans user_data acquired from bibcirculation_dblayer by removing comma before passing data to manipulating functions. (closes #2551)

• Handles missing arguments in case of place_new_request_stepX url by returning the right template to complete arguments. (closes #2552)

• Fixes an issue forbidding to print 'List of pending hold requests'. (closes #2562) (PR #2373)

Signed-off-by: Guillaume Lastecoueres <guillaume@tind.io>
Tested-by: Tibor Simko <tibor.simko@cern.ch>