Extend wait time for upgrade-mcp-release Jenkins job

For the 2019.2.8 MCP release the Drivetrain update process requires more than 2 hours

Change-Id: I4e62e54da5b22f36b323255f09b05f00215d2c73
Related-Prod:#PROD-35054
diff --git a/tcp_tests/tests/system/test_mcp_update.py b/tcp_tests/tests/system/test_mcp_update.py
index 4224278..2fa1bfa 100644
--- a/tcp_tests/tests/system/test_mcp_update.py
+++ b/tcp_tests/tests/system/test_mcp_update.py
@@ -188,7 +188,7 @@
         update_drivetrain = dt.start_job_on_jenkins(
             job_name=job_name,
             job_parameters=job_parameters,
-            build_timeout=2 * 60 * 60)
+            build_timeout=3 * 60 * 60)
 
         assert update_drivetrain == 'SUCCESS'