improvements to eni rendering

Some improvements here, and some bug fixes.
 - bring curtin revno 394's to support post-up for interface aliases.
 - sort attributes per interface for nicer order and consistent rendering
 - use arrays for each 'section' rather than content += . This allows
   better separation of the sections and also will perform better as long
   strings with += are slow.
 - improve how 'lo' is handled. If a network state that was being rendered
   had an entry for 'lo', then the rendered ENI would have 2 'lo'
   sections.
 - no longer skip 'lo' sections when loading an ENI in parse_deb_config
 - fix inet value for subnets, don't add interface attributes to alias
   (LP: #1588547)

Also add some tests of reading yaml and rendering ENI.

1 files changed, 12 insertions, 0 deletions

diff --git a/tests/unittests/helpers.py b/tests/unittests/helpers.py
index 8d46a8bf..972245df 100644
--- a/tests/unittests/helpers.py
+++ b/tests/unittests/helpers.py
@@ -264,6 +264,18 @@ def populate_dir(path, files):
             fp.close()
 
 
+def dir2dict(startdir, prefix=None):
+    flist = {}
+    if prefix is None:
+        prefix = startdir
+    for root, dirs, files in os.walk(startdir):
+        for fname in files:
+            fpath = os.path.join(root, fname)
+            key = fpath[len(prefix):]
+            flist[key] = util.load_file(fpath)
+    return flist
+
+
 try:
     skipIf = unittest.skipIf
 except AttributeError: