Update `create_fake_doc()`

Return path to created file, basename of created file and content of
created file instead of name of created file (and path to it at the same
time). It is made in order to delete file after uploading and save all
useful data in Robot Framework variables.

@@ -6,6 +6,7 @@ from uuid import uuid4
 from tempfile import NamedTemporaryFile
 from .local_time import get_now
 from op_faker import OP_Provider
+import os
 import random
 
 
@@ -44,7 +45,7 @@ def create_fake_doc():
     tf = NamedTemporaryFile(delete=False, suffix=suffix, prefix=prefix)
     tf.write(content)
     tf.close()
-    return tf.name
+    return tf.name, os.path.basename(tf.name), content
 
 
 def test_tender_data(params, periods=("enquiry", "tender")):