Add run_tests.sh script with pep8 command execution

Add pep8 command execution
usage:
./run_tests.sh -p

Change-Id: I558f7618a2e8533a35e63d4bdc001a8109f7fcf5

run_tests.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+function usage {
+  echo "Usage: $0 [OPTION]..."
+  echo ""
+  echo " -p, --pep8 Just run pep8"
+  echo " -h, --help Print this usage message"
+  echo ""
+  exit
+}
+
+function process_option {
+  case "$1" in
+    -h|--help) usage;;
+    -p|--pep8) just_pep8=1;;
+  esac
+}
+
+just_pep8=0
+
+for arg in "$@"; do
+    process_option $arg
+done
+
+function run_pep8 {
+  echo "Running pep8 ..."
+  # Opt-out files from pep8
+  ignore_scripts="*.pyc,*.pyo,*.sh,*.swp,*.rst"
+  ignore_files="*eventlet-patch:*pip-requires"
+  ignore_dirs=".venv,.tox,dist,doc,vendor,*egg"
+  GLOBIGNORE="$ignore_scripts:$ignore_files:$ignore_dirs"
+  ignore="$ignore_scripts,$ignore_dirs"
+  srcfiles="."
+  ${wrapper} pep8 --repeat $FLAGS --show-source \
+      --exclude=${ignore} ${srcfiles} | tee pep8.txt
+}
+
+if [ $just_pep8 -eq 1 ]; then
+run_pep8
+    exit
+fi
+