Textrac returns JSON with only the first 2 pages

Hi Carlos,

When we call "get_document_text_detection", it returns paginated results, along with "NextToken".
We can use the "NextToken" to iteratively call and fetch the rest of the parts of the results. [1]

Please have a look at [2] and [3], for referring to the part on how to use the "NextToken".
Example Code Snippet:

def getJobResults(jobId):
    pages = []
    client = boto3.client('textract')

    response = client.get_document_text_detection(JobId=jobId) 
    pages.append(response)
    print("Resultset page recieved: {}".format(len(pages)))
    nextToken = None
    if('NextToken' in response):
        nextToken = response['NextToken']

    while(nextToken):
        response = client.get_document_text_detection(JobId=jobId, NextToken=nextToken)
        pages.append(response)
        print("Resultset page recieved: {}".format(len(pages)))
        nextToken = None
        if('NextToken' in response):
            nextToken = response['NextToken']
    return pages

References:
[1] https://docs.aws.amazon.com/textract/latest/dg/API_GetDocumentTextDetection.html
[2] https://github.com/aws-samples/amazon-textract-serverless-large-scale-document-processing/blob/master/src/jobresultsproc.py
[3] https://medium.com/petabytz/automatically-extract-data-using-aws-textract-7a599b80b92