fix urlparse usage in cloud.amazon module to be compatible with python3 (#20917)

* fix urlparse usage in cloud.amazon module to be compatible with python3

* make imports style compatible with six documentation

lib/ansible/modules/cloud/amazon/_ec2_ami_search.py

@@ -95,7 +95,7 @@ EXAMPLES = '''
 
 import csv
 import json
-import urlparse
+import ansible.module_utils.six.moves.urllib.parse as urlparse
 
 SUPPORTED_DISTROS = ['ubuntu']
 

lib/ansible/modules/cloud/amazon/s3_bucket.py

@@ -112,7 +112,7 @@ EXAMPLES = '''
 
 import os
 import xml.etree.ElementTree as ET
-import urlparse
+import ansible.module_utils.six.moves.urllib.parse as urlparse
 
 from ansible.module_utils.basic import *
 from ansible.module_utils.ec2 import *