Make python venv not platform-dependent

python virtual enviroment does not need to be platform dependent. Use a
fixed path for all platforms.

Change-Id: Iad2e08e6082fa1dc0ea9bbbcabf92e947c7a7785

setup.sh

diff --git a/setup.sh b/setup.sh
index 5536b55..82ef87a 100644
--- a/setup.sh
+++ b/setup.sh
@@ -64,7 +64,7 @@
 export RENODE_PORT=1234
 
 export PYTHONPATH="${PYTHONPATH}:${ROOTDIR}/cicd/"
-export PYTHON_SHODAN_ENV="${CACHE}/${PLATFORM}-venv"
+export PYTHON_SHODAN_ENV="${CACHE}/shodan-venv"
 
 function renode
 {