Use oslo.log

Convert the use of the incubated version of the log module
to the new oslo.log library.

Sync oslo-incubator modules to update their imports as well.

Co-Authored-By: Doug Hellmann <doug@doughellmann.com>
Change-Id: Ic4932e3f58191869c30bd07a010a6e9fdcb2a12c

requirements.txt

@@ -32,6 +32,7 @@ websockify>=0.6.0,<0.7
 oslo.concurrency>=1.4.1         # Apache-2.0
 oslo.config>=1.6.0  # Apache-2.0
 oslo.context>=0.1.0 # Apache-2.0
+oslo.log>=0.1.0  # Apache-2.0
 oslo.serialization>=1.2.0               # Apache-2.0
 oslo.utils>=1.2.0                       # Apache-2.0
 oslo.db>=1.4.1  # Apache-2.0