file to free memory in test setup

cmake_targets/autotests/tools/free_mem.bash

+#!/bin/bash
+#******************************************************************************
+
+#    OpenAirInterface 
+#    Copyright(c) 1999 - 2014 Eurecom
+
+#    OpenAirInterface is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+
+
+#    OpenAirInterface is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+
+#   You should have received a copy of the GNU General Public License
+#   along with OpenAirInterface.The full GNU General Public License is 
+#   included in this distribution in the file called "COPYING". If not, 
+#   see <http://www.gnu.org/licenses/>.
+
+#  Contact Information
+#  OpenAirInterface Admin: openair_admin@eurecom.fr
+#  OpenAirInterface Tech : openair_tech@eurecom.fr
+#  OpenAirInterface Dev  : openair4g-devel@lists.eurecom.fr
+  
+#  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
+
+# *******************************************************************************/
+# \author Navid Nikaein, Rohit Gupta
+
+# To free unused memory else test setup runs out of memory
+sudo -E bash -c 'echo 3 > /proc/sys/vm/drop_caches ' 
+
+