added rru configuration file for oaisim

targets/PROJECTS/GENERIC-LTE-EPC/CONF/rru.oaisim.conf

+RUs = (
+    {		  
+      	local_if_name                    = "lo";			  
+      	remote_address                   = "127.0.0.2";
+    	local_address                    = "127.0.0.1"; 
+    	local_port                       = 50001;	     
+    	remote_port                      = 50000;
+	local_rf                         = "yes"
+    	tr_preference                    = "udp_if4p5";
+	nb_tx                            = 1;
+	nb_rx                            = 1;
+	max_pdschReferenceSignalPower    = -29;
+	max_rxgain                       = 120;
+	bands                            = [7,13];
+    }
+);  
+