cosalib: silence pylint E1120 for GI methods

pylint is treating GObject-introspected methods (from gi.repository) as
unbound instance methods that require a self argument, even though at
runtime these calls are valid and work as expected. This causes false
positive E1120 (no-value-for-parameter) errors on calls such as
RpmOstree.get_basearch() and Json.Generator.new().

Add disable comments to the affected GI calls to keep pylint from
complaining while preserving the existing behavior.

Author: marmijo

src/cmd-basearch

@@ -4,4 +4,4 @@
 import gi
 gi.require_version("RpmOstree", "1.0")
 from gi.repository import RpmOstree
-print(RpmOstree.get_basearch())
+print(RpmOstree.get_basearch())  # pylint: disable=E1120

src/commitmeta_to_json

@@ -25,7 +25,7 @@ commitmeta = commit.get_child_value(0)
 if sys.byteorder != 'big':
     commitmeta = commitmeta.byteswap()
 
-g = Json.Generator.new()
+g = Json.Generator.new()  # pylint: disable=E1120
 g.set_root(Json.gvariant_serialize(commitmeta))
 stdout = Gio.UnixOutputStream.new(sys.stdout.fileno(), False)
 g.set_pretty(True)

src/cosalib/cmdlib.py

@@ -409,7 +409,7 @@ def get_basearch():
     try:
         return get_basearch.saved
     except AttributeError:
-        get_basearch.saved = RpmOstree.get_basearch()
+        get_basearch.saved = RpmOstree.get_basearch()  # pylint: disable=E1120
         return get_basearch.saved