Update hacking for Python3

The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.

Ignore bashate failure on one-liner loops.

Add pcre devel packages to fix failing pep8 jobs.

Change-Id: I3442174b378cc6e361550fcb9b32a62f61fa7972

bindep.txt

+libpcre3-dev [platform:dpkg test]
+pcre-devel [platform:rpm test]

test-requirements.txt

@@ -7,7 +7,7 @@ bashate>=0.2 # Apache-2.0
 coverage>=4.0 # Apache-2.0
 doc8 # Apache-2.0
 docker<3 # Apache-2.0
-hacking>=0.12.0,<0.13 # Apache-2.0
+hacking>=3.0,<3.1.0 # Apache-2.0
 molecule<3 # MIT
 oslotest>=1.10.0 # Apache-2.0
 # paramiko 2.5.0 makes the kayobe-tox-molecule job fail.

tools/run-bashate.sh

@@ -3,5 +3,7 @@
 # Ignore E006 -- line length greater than 80 char
 
 ROOT=$(readlink -fn $(dirname $0)/.. )
+# NOTE(priteau): ignore E010 because it fails on one-liner bash loops:
+# https://bugs.launchpad.net/bash8/+bug/1895102
 find $ROOT -not -wholename \*.tox/\* -and -not -wholename \*.test/\* \
-    -and -name \*.sh -print0 | xargs -0 bashate -v --ignore E006
+    -and -name \*.sh -print0 | xargs -0 bashate -v --ignore E006 --ignore E010