LAVA: Deprecate redundant codes in LAVA helper

LAVA monitor only relies on bl2, regression tests and psa arch tests.
This patch updates the LAVA helper logics to select LAVA monitor in a
much easier way, instead of looping all build params.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: Ic00ce2ac308dcf4bd502212bb4e56234576b430f
diff --git a/lava_helper/jinja2_templates/fvp_mps3.jinja2 b/lava_helper/jinja2_templates/fvp_mps3.jinja2
index f02063f..744d84c 100644
--- a/lava_helper/jinja2_templates/fvp_mps3.jinja2
+++ b/lava_helper/jinja2_templates/fvp_mps3.jinja2
@@ -72,7 +72,7 @@
 - test:
     namespace: target
     monitors:
-    {%- for monitor in test.monitors %}
+    {%- for monitor in monitors %}
     - name: "{{monitor.name}}"
       start: "{{monitor.start}}"
       end: "{{monitor.end}}"