sleep between sdk calls in CircleCI test setup

Summary:
CircleCI tets have been failing because of an infra error (https://app.circleci.com/pipelines/github/facebookresearch/ReAgent/2590/workflows/2c96e442-4fa9-48fb-a910-7f13c42eebc9/jobs/26711/parallel-runs/0/steps/0-105)
I found the root cause in rate limiting: https://github.com/sdkman/sdkman-cli/issues?q=proxy+#issuecomment-1430703038
Sleeping in between `sdk` calls should reduce the probability of being throttled

Differential Revision: D43556203

fbshipit-source-id: 40a7a97bd835c214597d36c6216a036cc2b244f8

.circleci/config.yml

@@ -89,10 +89,15 @@ commands:
             sudo apt-get install zip
             curl -s "https://get.sdkman.io" | bash
             source "$HOME/.sdkman/bin/sdkman-init.sh"
+            sleep(5)
             sdk version
+            sleep(5)
             sdk install java 8.0.292.hs-adpt
+            sleep(5)
             sdk install scala
+            sleep(5)
             sdk install maven
+            sleep(5)
             sdk install spark 3.1.1
       - run:
           name: Build preprocessing package