workflows: Holding Pen stabilization

• Adds search feature through tags.

• Simplifies the sort code server side.

• Gets request parameters before application ones.

• Adds data extraction methods.

• Changes the way we are creating object to removes cyclic dependencies.

Signed-off-by: Guillaume Lastecoueres <guillaume.lastecoueres@cern.ch>
Reviewed-by: Jan Aage Lavik <jan.age.lavik@cern.ch>