fvp-linux.yaml: Increase download timeouts

It seems that communication channel between Tux and Jenkins can be congested
at times, and downloads of large Linux rootfs'es go pretty slow and cause
timeout. So, increase this timeout, and also increase download retry timeout
so such timeouts could actually help.

The issue was seen with
https://tuxapi.tuxsuite.com/v1/groups/tfc/projects/ci/tests/2c3slzjvL9FXtwsWnsL4B8m0HvQ

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I29cdcb9ca9fe2a6d7102a17563b0499bb45c9c1a
diff --git a/script/lava-templates/fvp-linux.yaml b/script/lava-templates/fvp-linux.yaml
index 1b4ca82..597354b 100644
--- a/script/lava-templates/fvp-linux.yaml
+++ b/script/lava-templates/fvp-linux.yaml
@@ -31,9 +31,9 @@
     lava-test-shell:
       seconds: 300
     http-download:
-      minutes: 2
+      seconds: 180
     download-retry:
-      minutes: 2
+      minutes: 6
     fvp-deploy:
       minutes: 5