Adapt dataservices-api server to python3

Related to https://github.com/CartoDB/cartodb-platform/issues/6237

test/helpers/import_helper.py

@@ -20,7 +20,7 @@ class ImportHelper:
         response.raise_for_status()
         response_json = json.loads(response.text)
         if not response_json['success']:
-            print "Error importing the test dataset: {0}".format(response.text)
+            print("Error importing the test dataset: {0}".format(response.text))
             sys.exit(1)
         while(True):
             table_name = ImportHelper.get_imported_table_name(
@@ -42,8 +42,8 @@ class ImportHelper:
             schema, username, host, import_id, api_key)
         import_data_response = requests.get(import_url)
         if import_data_response.status_code != 200:
-            print "Error getting the table name from " \
-                "the import data: {0}".format(import_data_response.text)
+            print("Error getting the table name from " \
+                "the import data: {0}".format(import_data_response.text))
             sys.exit(1)
         import_data_json = json.loads(import_data_response.text)
 
@@ -57,5 +57,5 @@ class ImportHelper:
         )
         response = requests.get(url)
         if response.status_code != 200:
-            print "Error cleaning the test dataset: {0}".format(response.text)
+            print("Error cleaning the test dataset: {0}".format(response.text))
             sys.exit(1)

test/helpers/integration_test_helper.py

@@ -48,7 +48,7 @@ class IntegrationTestHelper:
     def execute_query_raw(cls, sql_api_url, query):
         requests.packages.urllib3.disable_warnings()
         query_url = "{0}?q={1}".format(sql_api_url, query)
-        print "Executing query: {0}".format(query_url)
+        print("Executing query: {0}".format(query_url))
         query_response = requests.get(query_url)
         if query_response.status_code != 200:
             raise Exception(json.loads(query_response.text)['error'])

test/run_tests.py

@@ -36,7 +36,7 @@ def main():
         set_environment_variables(username, api_key, table_name, host, schema)
         execute_tests()
     except Exception as e:
-        print e.message
+        print(e)
         sys.exit(1)
     finally:
         clean_environment_variables()
@@ -45,11 +45,11 @@ def main():
 
 
 def usage():
-    print """Usage: run_tests.py [options] username api_key
+    print("""Usage: run_tests.py [options] username api_key
         Options:
         -h: Show this help
         --host: take that host as base (by default is cartodb.com)
-        --schema: define the url schema [http/https] (by default https)"""
+        --schema: define the url schema [http/https] (by default https)""")
 
 
 def execute_tests():
@@ -59,7 +59,7 @@ def execute_tests():
         stderr=subprocess.PIPE
     )
     out, err = process.communicate()
-    print err
+    print(err)
     regexp = re.compile(r'FAILED \(.*\)')
     if regexp.search(err) is not None:
         sys.exit(1)