toolbox: pin ansible.posix to <1.5.4

ansible.posix 1.5.4 has been released and it broke the way
we use JSON callback plugin (it requires play.path) - see [1] and [2].

[1]: ansible-collections/ansible.posix@3bbf2e3
[2]: ansible-collections/ansible.posix#461

Change-Id: I2f879e59a64b9039a8a27c40bd462fde4df73f43
(cherry picked from commit d965b1b)

Author: mnasiadka

docker/kolla-toolbox/requirements.yml

@@ -1,7 +1,7 @@
 ---
 collections:
   - name: ansible.posix
-    version: '<2'
+    version: '<1.5.4'
   - name: community.general
     version: '<4'
   - name: community.mysql