[BUG] [download-requirements.py] Running yum commands may hang waiting for user input

[przemyslavic]

Describe the bug
When download-requirements.py script is executed, repository gpg keys are added and then yum commands are run.

2022-03-14 13:04:59,881 [DEBUG]: [1/3] Running: yum -y repolist
2022-03-14 13:05:00,470 [DEBUG]: [1/3] Running: yum repolist enabled

However, recently I ran into a problem with gpg key for the kubernetes repository.
This caused the script to hang waiting for confirmation from the user:

[root@8ad3e885293f /]# yum repolist enabled
Loaded plugins: fastestmirror, ovl
Loading mirror speeds from cached hostfile
* base: ftp.agh.edu.pl
* extras: ftp.pbone.net
* updates: ftp.pbone.net
kubernetes/signature | 844 B 00:00:00
Retrieving key from https://packages.cloud.google.com/yum/doc/yum-key.gpg
Importing GPG key 0x7AA99B80:
Userid : "Rapture Automatic Signing Key (cloud-rapture-signing-key-2022-03-07-08_01_01.pub)"
Fingerprint: e89b faec 34d3 1829 362f 7f7b 5668 44f3 7aa9 9b80
From : https://packages.cloud.google.com/yum/doc/yum-key.gpg
Is this ok [y/N]:

We should add the -y flag to the yum commands to be able to continue executing the script in non-interactive mode.

How to reproduce
Steps to reproduce the behavior:

1. Run download-requirements script on RHEL where we are now experiencing a problem with the kubernetes repository key.

Expected behavior
The download requirements script should succeed or simply fail but not hang forever.

Environment

• Cloud provider: [AWS | Azure | All | None]
• OS: [RHEL 7.9`]

epicli version: [2.0.0dev]

Additional context
Add any other context about the problem here.

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