Adapt tests

display option to display the generated document before sending it
Move dry-run option as a general one
Add error handling to have dry-run and display options together
Test when display and dry_run options are passed together

* Move patched functions from test_membership.py to relevant files
    * blockchain_tools.py
        * create mocked_block variable
        * make both patched_block and patched_head_block return mocked_block
    * auth.py
    * wot.py
* modify a pubkey list in patched/wot.py
* change calls in the tests
* change pubkeys in patched/money.py to match new pubkey_list

* add patched auth functions