tf-a-builder.yaml: Retry LAVA job only 2 times total

If it's a truly random failure, 2nd try should clear it with a high
probability. Otherwise, if it's a systematic failure, makes no sense
to hammer LAVA 3 times, growing its queue (already a problem for us)
and keeping Jenkins executores busy-spinning waiting for it (already
a problem for us).

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I5b75fa9d0db506d87b7e9a2f3108c004624790e4
diff --git a/tf-a-builder.yaml b/tf-a-builder.yaml
index 08de3e8..d845927 100644
--- a/tf-a-builder.yaml
+++ b/tf-a-builder.yaml
@@ -154,7 +154,7 @@
                                 # FVP jobs may hang at some particular TFTF test (see
                                 # https://linaro.atlassian.net/browse/TFC-176)
                                 passed=0
-                                for i in $(seq 1 3); do
+                                for i in $(seq 1 2); do
                                     echo "# SQUAD submission iteration #$i"
                                     if $squad; then
                                         passed=1