tf-a-eclair-delta: Increase job timeout to 300min

Recentely, many jobs failed due to timeout. So, while normal run time
for this job is usually under 3hrs, allow more time for when system is
loaded.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I92ffa6f8a23860ef88e32a32fd203db19f623252
diff --git a/tf-a-eclair-delta.yaml b/tf-a-eclair-delta.yaml
index 7971e65..9883bdf 100644
--- a/tf-a-eclair-delta.yaml
+++ b/tf-a-eclair-delta.yaml
@@ -93,7 +93,7 @@
     wrappers:
     - timestamps
     - timeout:
-        timeout: 250
+        timeout: 300
         fail: true
     - credentials-binding:
       - ssh-user-private-key: