Fixed bugs in choosing payload length and format

[CaptainFreak]

Fixed the following bug and other relevant error in nosql web attack.

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 v0.7 codingo@protonmail.com        |_|   

1-Set options
2-NoSQL DB Access Attacks
3-NoSQL Web App attacks
4-Scan for Anonymous MongoDB Access
5-Change Platform (Current: MongoDB)
x-Exit
Select an option: 3
Web App Attacks (GET)
===============
Checking to see if site at http://juice-shop.herokuapp.com:80/#/track-result?id=juice-shop.herokuapp.com/#/track-result … is up...
App is up!
Baseline test-Enter random string size: 5
What format should the random string take?
1-Alphanumeric
2-Letters only
3-Numbers only
4-Email address
Select an option: 1
Select an option: 1
Select an option: 1
Select an option: 1
Select an option: 1
Select an option: 1
Select an option: 1
Select an option: 1
Select an option: 1
Select an option: 1
Select an option: 1
Select an option:

[codingo]

Awesome work. I'm out at the moment but will review this ASAP.

[CaptainFreak]

Was this due to recent changes ? observed that other people are also noticing this bug at the same time. :)

[codingo]

Closes #70