tools: Fix python -> python3 for bots scripts.
This also turns off the custom lint check that was
preventing an explicit version for scripts in "tools".
Fixes
MODIFY
tools/custom_check.py
tools/custom_check.py
@@ -165,8 +165,7 @@ def build_custom_checkers(by_lang):
# This rule might give false positives in virtualenv setup files which should be excluded,
# and comments which should be rewritten to avoid use of "python2", "python3", etc.
{'pattern': 'python[23]',
- 'exclude': set(['tools/provision']),
- 'include_only': set(['zulip/', 'tools/', 'zulip_botserver/']),
+ 'include_only': set(['zulip/', 'zulip_botserver/']),
'description': 'Explicit python invocations should not include a version'},
{'pattern': '__future__',
'include_only': set(['zulip_bots/zulip_bots/bots/']),

MODIFY
tools/test-bots
tools/test-bots
-#!/usr/bin/env python
+#!/usr/bin/env python3
from os.path import dirname, basename
from importlib import import_module

MODIFY
tools/test-lib
tools/test-lib
-#!/usr/bin/env python
+#!/usr/bin/env python3
import os
import sys

tools: Fix python -> python3 for bots scripts.

This also turns off the custom lint check that was
preventing an explicit version for scripts in "tools".

Fixes #187