Avoid yanked ruamel.yaml.clib version (#8372)

See https://pypi.org/project/ruamel.yaml.clib/#history

Signed-off-by: Mathieu Parent <math.parent@gmail.com>
(cherry picked from commit 7ae00947f5)

requirements-2.10.txt

@@ -6,5 +6,5 @@ netaddr==0.7.19
 pbr==5.4.4
 jmespath==0.9.5
 ruamel.yaml==0.16.10
-ruamel.yaml.clib==0.2.4
+ruamel.yaml.clib==0.2.6
 MarkupSafe==1.1.1

requirements-2.11.txt

@@ -6,5 +6,5 @@ netaddr==0.7.19
 pbr==5.4.4
 jmespath==0.9.5
 ruamel.yaml==0.16.10
-ruamel.yaml.clib==0.2.4
+ruamel.yaml.clib==0.2.6
 MarkupSafe==1.1.1

requirements-2.9.txt

@@ -4,6 +4,6 @@ netaddr==0.7.19
 pbr==5.4.4
 jmespath==0.9.5
 ruamel.yaml==0.16.10
-ruamel.yaml.clib==0.2.4 ; python_version >= '3.5'
+ruamel.yaml.clib==0.2.6 ; python_version >= '3.5'
 ruamel.yaml.clib==0.2.2 ; python_version < '3.5'
 MarkupSafe==1.1.1