boto3: Foundation laid for boto3 tests

Added sample config file for boto3 and vstart.sh

Modified setup.py, requirements.txt, and README

Added an rgw_interactive.py to use interactively
with vstart.sh and python -i

Ported 400+ tests over to boto3 from functional/test_s3.py

Signed-off-by: Ali Maredia <amaredia@redhat.com>

s3tests_boto3/functional/utils.py

@@ -0,0 +1,49 @@
+import random
+import requests
+import string
+import time
+
+from nose.tools import eq_ as eq
+
+def assert_raises(excClass, callableObj, *args, **kwargs):
+    """
+    Like unittest.TestCase.assertRaises, but returns the exception.
+    """
+    try:
+        callableObj(*args, **kwargs)
+    except excClass as e:
+        return e
+    else:
+        if hasattr(excClass, '__name__'):
+            excName = excClass.__name__
+        else:
+            excName = str(excClass)
+        raise AssertionError("%s not raised" % excName)
+
+def generate_random(size, part_size=5*1024*1024):
+    """
+    Generate the specified number random data.
+    (actually each MB is a repetition of the first KB)
+    """
+    chunk = 1024
+    allowed = string.ascii_letters
+    for x in range(0, size, part_size):
+        strpart = ''.join([allowed[random.randint(0, len(allowed) - 1)] for _ in xrange(chunk)])
+        s = ''
+        left = size - x
+        this_part_size = min(left, part_size)
+        for y in range(this_part_size / chunk):
+            s = s + strpart
+        s = s + strpart[:(this_part_size % chunk)]
+        yield s
+        if (x == size):
+            return
+
+def _get_status(response):
+    status = response['ResponseMetadata']['HTTPStatusCode']
+    return status
+
+def _get_status_and_error_code(response):
+    status = response['ResponseMetadata']['HTTPStatusCode']
+    error_code = response['Error']['Code']
+    return status, error_code