tests: increase delay while app gets created
tests: increase delay while app gets created

* Removes `-h` flag on `flask run` following latest cookiecutter.

Signed-off-by: Diego Rodriguez <288245649d05cf8f96289b2b35cece8d6bcb04be@cern.ch>

inveniosoftware/invenio-theme,inveniosoftware/invenio-theme,inveniosoftware/invenio-theme,inveniosoftware/invenio-theme