Added Slim Fly model

src/network-workloads/conf/modelnet-synthetic-slimfly-min.conf

+LPGROUPS
+{
+   MODELNET_GRP
+   {
+      repetitions="338";				# The number of repetitions of this modelnet group
+      server="9";					# The number of servers attached to a terminal (should always equal num_terminals)
+      modelnet_slimfly="9";			# The number of terminals attached to a router
+      slimfly_router="1";			# The number of routers in a modelnet group
+   }
+}
+PARAMS
+{
+   packet_size="256";				# Size of packets/messages in the simulation
+   modelnet_order=( "slimfly" );
+   # scheduler options
+   modelnet_scheduler="fcfs";
+   chunk_size="256";
+   # modelnet_scheduler="round-robin";
+   num_vcs="4";
+   num_routers="13";					# The number of routers in a slimfly group
+   num_terminals="9";				# The number of terminals connected to a router (should be same as "modelnet_slimfly" above)
+   global_channels="13";
+   local_channels="6";
+   local_vc_size="25600";
+   global_vc_size="25600";
+   cn_vc_size="25600";
+   local_bandwidth="9.0";
+   global_bandwidth="9.0";
+   cn_bandwidth="9.0";
+   router_delay="0";
+   link_delay="0";
+   message_size="512";				# Upper bound on MPI message size in ROSS
+   routing="minimal";
+}