bitbake: toaster: fix imports to work for python 3

Some APIs have been moved to other modules in python 3:
 getstatusoutput: moved from commands to subproces
 urlopen: moved from urllib2 to urllib.request
 urlparse: moved from urlparse to urllib.parse

Made the imports work for both python versions by
catching ImportError and importing APIs from different
modules.

[YOCTO #9584]

(Bitbake rev: 1abaa1c6a950b327e6468192dd910549643768bb)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/utils.py

@@ -41,7 +41,6 @@ from subprocess import getstatusoutput
 from contextlib import contextmanager
 from ctypes import cdll
 
-
 logger = logging.getLogger("BitBake.Util")
 python_extensions = [e for e, _, _ in imp.get_suffixes()]
 

bitbake/lib/toaster/orm/models.py

@@ -1147,18 +1147,26 @@ class LayerIndexLayerSource(LayerSource):
         assert self.apiurl is not None
         from django.db import transaction, connection
 
-        import urllib2, urlparse, json
+        import json
         import os
+
+        try:
+            from urllib.request import urlopen, URLError
+            from urllib.parse import urlparse
+        except ImportError:
+            from urllib2 import urlopen, URLError
+            from urlparse import urlparse
+
         proxy_settings = os.environ.get("http_proxy", None)
         oe_core_layer = 'openembedded-core'
 
         def _get_json_response(apiurl = self.apiurl):
-            _parsedurl = urlparse.urlparse(apiurl)
+            _parsedurl = urlparse(apiurl)
             path = _parsedurl.path
 
             try:
-                res = urllib2.urlopen(apiurl)
-            except urllib2.URLError as e:
+                res = urlopen(apiurl)
+            except URLError as e:
                 raise Exception("Failed to read %s: %s" % (path, e.reason))
 
             return json.loads(res.read())