CORD-2630: Update structlog to version that support Sapan's color logs
patch (https://github.com/hynek/structlog/commit/90ba9cfada8d7bc557057b580dd0de161659c29e)

Change-Id: I859e6b31d0f00465f7cde52309766d8e28688167
diff --git a/containers/xos/pip_requirements.txt b/containers/xos/pip_requirements.txt
index 97ed749..a5ccc8e 100644
--- a/containers/xos/pip_requirements.txt
+++ b/containers/xos/pip_requirements.txt
@@ -77,7 +77,7 @@
 mock==2.0.0
 monotonic==1.2
 msgpack-python==0.4.8
-multistructlog==1.1
+multistructlog==1.5
 networkx==1.11
 numpy==1.13.1
 munch==2.0.4
@@ -151,7 +151,7 @@
 simplejson==3.8.2
 six==1.10.0
 stevedore==1.17.1
-structlog==17.2.0
+structlog==18.1.0
 supervisor==3.0b2
 texttable==0.8.7
 tosca-parser==0.8.1