Remove testr

* Remove .testr.conf as there is no tests dir and update .gitignore
  accordingly
* Use 3.18.0 as the minversion for tox in order to use
  allowlist_externals option

Signed-off-by: HeroicHitesh <email.hiteshkumar@gmail.com>
Change-Id: I0efdc4dd0ce658cc13c543946c6af1da867e6d4b

.gitignore

@@ -38,7 +38,6 @@ pip-log.txt
 .coverage
 .tox
 nosetests.xml
-.testrepository
 
 # Translations
 *.mo

.testr.conf

@@ -1,7 +0,0 @@
-[DEFAULT]
-test_command=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} \
-             OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \
-             OS_TEST_TIMEOUT=${OS_TEST_TIMEOUT:-60} \
-             ${PYTHON:-python} -m subunit.run discover -t ./ . $LISTOPT $IDOPTION
-test_id_option=--load-list $IDFILE
-test_list_option=--list

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-minversion = 3.1.1
+minversion = 3.18.0
 envlist = docs
 skipsdist = true
 ignore_basepython_conflict = true
@@ -8,7 +8,7 @@ ignore_basepython_conflict = true
 basepython = python3
 
 [testenv:docs]
-whitelist_externals =
+allowlist_externals =
   rm
 deps =
   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}