ansible: fix requires & upgrade issue using a playbook.

Fixes: #1508

Original author of this fix is:
snapshotleisure <sfzhao99@hotmail.com>
#1517

Change-Id: I32f1f352dea9d33de88f57a7180cfb1ea30f4f4a
Signed-off-by: Shreenidhi Shedi <sshedi@vmware.com>
Reviewed-on: http://photon-jenkins.eng.vmware.com:8082/c/photon/+/22341
Tested-by: gerrit-photon <photon-checkins@vmware.com>

Author: sshedi

SPECS/ansible/ansible.spec

@@ -1,7 +1,7 @@
 Summary:        Configuration-management, application deployment, cloud provisioning system
 Name:           ansible
 Version:        2.14.2
-Release:        1%{?dist}
+Release:        2%{?dist}
 License:        GPLv3+
 URL:            https://www.ansible.com
 Group:          Development/Libraries
@@ -35,6 +35,7 @@ Requires: python3-PyYAML
 Requires: python3-xml
 Requires: python3-paramiko
 Requires: python3-resolvelib
+Requires: python3-curses
 
 %description
 Ansible is a radically simple IT automation system. It handles configuration-management, application deployment, cloud provisioning, ad-hoc task-execution, and multinode orchestration - including trivializing things like zero downtime rolling updates with load balancers.
@@ -71,6 +72,9 @@ touch -r %{SOURCE3} %{buildroot}%{_rpmconfigdir}/%{name}_collection.py
 %{_rpmconfigdir}/%{name}_collection.py
 
 %changelog
+* Mon Nov 13 2023 Shreenidhi Shedi <sshedi@vmware.com> 2.14.2-2
+- Fix requires
+- Fix an issue in upgrade using playbook.
 * Wed Feb 22 2023 Nitesh Kumar <kunitesh@vmware.com> 2.14.2-1
 - Version upgrade to v2.14.2
 * Fri Dec 16 2022 Nitesh Kumar <kunitesh@vmware.com> 2.14.1-1

SPECS/ansible/tdnf.py

@@ -289,6 +289,9 @@ def convert_to_list(input_list):
     """Convert nested list into flat list"""
     flat_list = []
 
+    if not input_list:
+        return flat_list
+
     for sublist in input_list:
         if not isinstance(sublist, list):
             flat_list.append(sublist)