Merge "Skip package install in pep8 tox env"

tox.ini

@@ -40,16 +40,21 @@ deps = {[testenv]deps}
 commands = {toxinidir}/tools/states_to_dot.py -f {toxinidir}/doc/source/images/states.svg --format svg
 
 [testenv:pep8]
+# NOTE(rpittau): pep8 only runs pre-commit; skip installing ironic and
+# its runtime dependencies.
+skip_install = true
 deps = pre-commit
 commands = pre-commit run --all-files --show-diff-on-failure {posargs}
 
 [testenv:bandit]
+skip_install = true
 deps = {[testenv:pep8]deps}
 commands = pre-commit run --all-files --show-diff-on-failure bandit
 
 [testenv:codespell]
 description =
   Run codespell to check spelling
+skip_install = true
 deps = {[testenv:pep8]deps}
 commands = pre-commit run --all-files --show-diff-on-failure codespell