Moves creation tests
Moves minimal tests
Moves required custom field tests
Removes test with unclear purpose
Moves custom field test to spec
Moves WP type tests to spec
Moves WP category tests to spec
Reworks work package copy spec
Moves work package copy tests to spec
Moves work package relation tests to spec
Moves work package version tests to spec
Moves work package move test to spec
Moves work package copy tests to spec
Puts work package relation tests in separate file
Fixes work package relation spec
Moves issue functions to work package