tox: Hardcode more indirect deps for flake8 env

We added more flake8 checkers but never regenerated those, causing some
updates to happen silently and (probably?) breaking stuff.

tox.ini

@@ -144,27 +144,34 @@ basepython = python3
 passenv =
 deps =
     -r{toxinidir}/requirements.txt
-    flake8==2.5.4
-    flake8-debugger==1.4.0
-    pep8-naming==0.3.3
-    flake8-putty==0.3.2
     ebb-lint==0.4.4
+    flake8==2.5.4
     flake8-copyright==0.1
-    mccabe==0.4.0
-    pep8==1.7.0
-    pyflakes==1.2.2
-    flake8-string-format==0.2.1
+    flake8-debugger==1.4.0
     flake8-deprecated==1.0
+    flake8-docstrings==0.2.6
+    flake8-future-import==0.3.2
     flake8-mock==0.2
     flake8-pep3101==0.3
-    flake8-docstrings==0.2.6
-    flake8-tuple==0.2.9
+    flake8-putty==0.3.2
+    flake8-string-format==0.2.1
     flake8-tidy-imports==1.0.0
-    flake8-future-import==0.3.2
+    flake8-tuple==0.2.9
     hacking==0.11.0
+    intervaltree==2.1.0
+    mccabe==0.4.0
+    packaging==16.7
+    pbr==1.9.1
     # still needed by flake8-docstrings but ignored
     pep257==0.7.0
+    pep8==1.7.0
+    pep8-naming==0.3.3
     pydocstyle==1.0.0
+    pyflakes==1.2.2
+    pyparsing==2.1.2
+    six==1.10.0
+    sortedcontainers==1.4.4
+    venusian==1.0
 commands =
     {envpython} -m flake8