web/application: instantiate the repository outside of CubicWebPublisher
This improves decoupling and allows ``CubicWebPublisher`` user to choose which
argument are used during ``Repository`` instantiation. In particular is allows
caller to provide a ``TaskManager``.
The `vreg` argument of publisher is made mandatory. See CubicWebPublisher
docstring for details.
Related to #2249513
[MESSAGES CONTROL]
disable-msg = C0301
[VARIABLES]
# Enable / disable this checker
enable-variables = yes
additional-builtins = _, display_name
[BASIC]
required-attributes=
attr-rgx = (w|[a-z_][a-z0-9_]{2,30})
variable-rgx = (w|[a-z_][a-z0-9_]{2,30})$
argument-rgx = (w|[a-z_][a-z0-9_]{2,30})$
[TYPECHECK]
generated-members=debug,info,notice,warning,error,critical,exception