Update default branch to Kohn

Update default branch to Kohn

*** This commit is generated by a PF release script ***

Issue-ID: POLICY-4377
Signed-off-by: liamfallon <liam.fallon@est.tech>
Change-Id: I1e378fb5411350b14ff8dfc924d95eddd924b22b
diff --git a/.gitreview b/.gitreview
index 9caef27..4e1117c 100644
--- a/.gitreview
+++ b/.gitreview
@@ -2,4 +2,4 @@
 host=gerrit.onap.org
 port=29418
 project=policy/models.git
-defaultbranch=master
+defaultbranch=kohn