Random String Utility

RANDOM_STRING - Generate a random string

When a name is needed but none is provided, never fear
RANDOM_STRING is here! As configured returns a random
set of upper case letters (default of 10 long)

Input:
@length
value - Length of the random string to generate
default - 10
type - int
@type
value - Type of characters to include.
1 = A-Z, 2 = a-z, 3=letters/#'s/special chars
default - 1
type - int

Return:
@str
value - The generated random string
type - str

Usage:
my_str = random_string(); % 10 upper case letters
my_str = random_string(15); % 5 upper case letters
my_str = random_string(8, 3); % 8 ascii characters