tests docs: upgrade python packages

- Upgrade python package requirements for test & docs
- Clean up docs generation warnings
- Consolidate python requirements for docs in test
  requirements specs.
- Upgrade pip

Type: make

Change-Id: I74a3924b43ed93d15b32ec9f6fc41ed1ba95b69b
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
diff --git a/docs/gettingstarted/developers/index.rst b/docs/gettingstarted/developers/index.rst
index 9b9a67f..b47abcd 100644
--- a/docs/gettingstarted/developers/index.rst
+++ b/docs/gettingstarted/developers/index.rst
@@ -44,4 +44,5 @@
    quic_plugin
    cross_compile_macos.rst
    cnat
+   ipsec
    VPPAPI.md