Merge "Revert "Change Neutron's default ML2 driver to OVN""
diff --git a/lib/cinder b/lib/cinder
index 34d6186..cfa3693 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -286,9 +286,6 @@
                 default_name=$be_name
             fi
             enabled_backends+=$be_name,
-
-            iniset $CINDER_CONF $be_name volume_clear $CINDER_VOLUME_CLEAR
-
         done
         iniset $CINDER_CONF DEFAULT enabled_backends ${enabled_backends%,*}
         if [[ -n "$default_name" ]]; then
diff --git a/lib/cinder_backends/lvm b/lib/cinder_backends/lvm
index 497081c..e03ef14 100644
--- a/lib/cinder_backends/lvm
+++ b/lib/cinder_backends/lvm
@@ -52,7 +52,7 @@
     iniset $CINDER_CONF $be_name volume_group $VOLUME_GROUP_NAME-$be_name
     iniset $CINDER_CONF $be_name target_helper "$CINDER_ISCSI_HELPER"
     iniset $CINDER_CONF $be_name lvm_type "$CINDER_LVM_TYPE"
-
+    iniset $CINDER_CONF $be_name volume_clear "$CINDER_VOLUME_CLEAR"
 }
 
 # init_cinder_backend_lvm - Initialize volume group
diff --git a/tox.ini b/tox.ini
index ed28636..ec764ab 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-minversion = 1.6
+minversion = 3.18.0
 skipsdist = True
 envlist = bashate
 
@@ -13,7 +13,7 @@
 # modified bashate tree
 deps =
    {env:BASHATE_INSTALL_PATH:bashate==2.0.0}
-whitelist_externals = bash
+allowlist_externals = bash
 commands = bash -c "find {toxinidir}             \
          -not \( -type d -name .?\* -prune \)    \
          -not \( -type d -name doc -prune \)     \
@@ -34,8 +34,10 @@
          -print0 | xargs -0 bashate -v -iE006 -eE005,E042"
 
 [testenv:docs]
-deps = -r{toxinidir}/doc/requirements.txt
-whitelist_externals = bash
+deps =
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -r{toxinidir}/doc/requirements.txt
+allowlist_externals = bash
 setenv =
   TOP_DIR={toxinidir}
 commands =
@@ -43,7 +45,7 @@
 
 [testenv:pdf-docs]
 deps = {[testenv:docs]deps}
-whitelist_externals =
+allowlist_externals =
    make
 commands =
    sphinx-build -W -b latex doc/source doc/build/pdf