Configurable generators

The following generators support additional configuration options:

Generator ID	Configuration options	Description	Default value
`range`	`min`, `max`	Controls the minimum and maximum values. Supported for Rell types: integer, decimal, big_integer	(min, max) are required
`byte_array`	`size`	Controls the size of the generated byte array	32
`text`	`min`, `max`	Controls the minimum and maximum length of the generated string	(1, 10)
`predefined`	`distribution` `values`	Controls the order picking values (SEQUENTIAL/RANDOM) List of values to be used	SEQUENTIAL Empty array

Example configurations:

<entity_name>:
  count: 10
  attributes:
    # Integer with range
    <attribute_name_one>:
      generator: text
      min: 18
      max: 65
    <attribute_name_two>:
      generator: byte_array
      size: 20
    <attribute_name_three>:
      generator: predefineds
      values: [1, 2, 3]
      distribution: RANDOM