RFR: JDK-8156733: JIB fails to follow redirects

[Stefan Särne]

Please review this small fix to make jib more resilient.
It will follow redirects, and it will retry on network hickups.

@@ -87,11 +87,11 @@

     if command -v curl > /dev/null; then
-        getcmd="curl -s"
+        getcmd="curl -s -L --retry 3 --retry-delay 5"


Thanks
Stefan