Cherry-pick suppression.xml

Change-Id: I7d4b324af523e4b52663c4b7616cf625c2d89e00
diff --git a/tools/build/conf/src/main/resources/onos/suppressions.xml b/tools/build/conf/src/main/resources/onos/suppressions.xml
index bfa6412..0f537f2 100644
--- a/tools/build/conf/src/main/resources/onos/suppressions.xml
+++ b/tools/build/conf/src/main/resources/onos/suppressions.xml
@@ -52,6 +52,9 @@
     <suppress checks="Javadoc.*"
               files=".*/demo/.*.java"/>
 
+    <suppress checks="FileLength"
+              files=".*/SegmentRoutingManager.java"/>
+
     <!-- Suppressions for yangutils generated code -->
     <suppress files="org.onosproject.yang.gen.v1.*" checks="Javadoc.*" />
 </suppressions>