Fix broken swagger documentation and requirements.txt parsing

Change-Id: If9932b9d3ca19f0e4d53dfcd03cd35fdacde8f62
diff --git a/containers/chameleon/Dockerfile.chameleon b/containers/chameleon/Dockerfile.chameleon
index 059ef0a..ce1dd45 100644
--- a/containers/chameleon/Dockerfile.chameleon
+++ b/containers/chameleon/Dockerfile.chameleon
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # xosproject/chameleon
-FROM xosproject/xos-base:2.2.7
+FROM xosproject/xos-base:2.2.8
 
 # xos-base already has protoc and dependencies installed