Codefixes

[obijan42]

Issue #, if available:

Description of changes:

• Exception handling
• Fix hanging when attempting to subscribe the master to itself
• Implemented prompt-skipping for use in automation
• Don't re-do standards that are already active
• CSV file is now optional. It can autodetect the entire org instead
• Changed references to python3

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[ryanholland]

Hi,
Appreciate the changes you've made, however I do not think we can accept the commit to add Organization support as it leverages protected APIs, specifically ListAccounts, which can only be called from the Organization Master account and will result in a failure if called from any other account. We guide users to minimize use of the Organization Master account and in many cases that account will not be accessible to those deploying Security Hub.

[obijan42]

The added support is an option, which nobody is forced to use. The way the latest version works:
IF you don't supply a CSV, then
If the org call works, it uses that, else
It complains that you didn't specify a list

So that should be backwards compatible for all cases.