Refactor multimap streams to avoid blocking iteration on initialization

Change-Id: I6a357b37e85808972267ef2daf5328fd5035aac4
diff --git a/tools/build/bazel/generate_workspace.bzl b/tools/build/bazel/generate_workspace.bzl
index a789d10..1239015 100644
--- a/tools/build/bazel/generate_workspace.bzl
+++ b/tools/build/bazel/generate_workspace.bzl
@@ -1,4 +1,4 @@
-# ***** This file was auto-generated at Fri, 29 Jun 2018 16:58:53 GMT. Do not edit this file manually. *****
+# ***** This file was auto-generated at Sat, 30 Jun 2018 08:02:29 GMT. Do not edit this file manually. *****
 # ***** Use onos-lib-gen *****
 
 load("//tools/build/bazel:variables.bzl", "ONOS_GROUP_ID", "ONOS_VERSION")
@@ -132,8 +132,8 @@
 
     native.maven_jar(
         name = "atomix",
-        artifact = "io.atomix:atomix:2.0.22",
-        sha1 = "6c4f4d95ad933ac612ef9ab85b22f5c4f714a3e1",
+        artifact = "io.atomix:atomix:2.0.23",
+        sha1 = "6b41cebf257e0094c2276b6fa589b2c73aff5f99",
     )
 
     native.maven_jar(
@@ -2110,7 +2110,7 @@
 artifact_map[str(Label("@aopalliance_repackaged//jar"))] = "mvn:org.glassfish.hk2.external:aopalliance-repackaged:jar:2.5.0-b42"
 artifact_map[str(Label("@amqp_client//jar"))] = "mvn:com.rabbitmq:amqp-client:jar:3.6.1"
 artifact_map[str(Label("@asm//jar"))] = "mvn:org.ow2.asm:asm:jar:5.0.4"
-artifact_map[str(Label("@atomix//jar"))] = "mvn:io.atomix:atomix:jar:2.0.22"
+artifact_map[str(Label("@atomix//jar"))] = "mvn:io.atomix:atomix:jar:2.0.23"
 artifact_map[str(Label("@commons_codec//jar"))] = "mvn:commons-codec:commons-codec:jar:1.10"
 artifact_map[str(Label("@commons_cli//jar"))] = "mvn:commons-cli:commons-cli:jar:1.3"
 artifact_map[str(Label("@commons_collections//jar"))] = "mvn:commons-collections:commons-collections:jar:3.2.2"