Merge "Switch from testr to ostestr"

tools/ostestr_compat_shim.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# preserve old behavior of using an arg as a regex when '--' is not present
+case $@ in
+  (*--*) ostestr $@;;
+  ('') ostestr;;
+  (*) ostestr --regex "$@"
+esac

tox.ini

@@ -13,8 +13,8 @@ deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 whitelist_externals = sh
 commands =
-  sh tools/pretty_tox.sh '{posargs}'
-# there is also secret magic in pretty_tox.sh which lets you run in a fail only
+  {toxinidir}/tools/ostestr_compat_shim.sh {posargs}
+# there is also secret magic in ostestr which lets you run in a fail only
 # mode. To do this define the TRACE_FAILONLY environmental variable.
 
 [testenv:common-constraints]