ansible and jinja2 updates (#7357)

* Update ansible to v2.9.18

Signed-off-by: Maciej Wereski <m.wereski@partner.samsung.com>

* Update jinja2 to v2.11.3

Signed-off-by: Maciej Wereski <m.wereski@partner.samsung.com>

requirements.txt

-ansible==2.9.17
-jinja2==2.11.1
+ansible==2.9.18
+jinja2==2.11.3
 netaddr==0.7.19
 pbr==5.4.4
 jmespath==0.9.5