Scapy; update to release 2.4.0

Change-Id: Ibcae49ab106efa9cd0ff60be60904ac5a2fc0b65
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
diff --git a/test/Makefile b/test/Makefile
index 88192e7..4e2863c 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -54,7 +54,7 @@
 endif
 
 PYTHON_VENV_PATH=$(VPP_PYTHON_PREFIX)/virtualenv
-PYTHON_DEPENDS=$(PYTHON_EXTRA_DEPENDS) faulthandler six scapy==2.4.0rc5 pexpect cryptography subprocess32 cffi git+https://github.com/vpp-dev/py-lispnetworking
+PYTHON_DEPENDS=$(PYTHON_EXTRA_DEPENDS) faulthandler six scapy==2.4.0 pexpect cryptography subprocess32 cffi git+https://github.com/vpp-dev/py-lispnetworking
 SCAPY_SOURCE=$(shell find $(PYTHON_VENV_PATH) -name site-packages)
 BUILD_COV_DIR=$(BR)/test-cov