Add Thomas to QA

Change-Id: I64d99b03730d7567d1f93adf734e6436b59a9785

sessions/maintainers-qa.md

diff --git a/sessions/maintainers-qa.md b/sessions/maintainers-qa.md
index c736edb..b73d4a6 100644
--- a/sessions/maintainers-qa.md
+++ b/sessions/maintainers-qa.md
@@ -13,3 +13,4 @@
 * [Luca Milanesio - GerritForge](/speakers.md#luca)
 * [Patrick Hiesel - Google](/speakers.md#hiesel)
 * Sasa Zivkov - SAP
+* [Thomas Dräbing - SAP](/speakers.md#thomas-draebing---sap-tdraebing)