Illustrates slow startup times using the Rollbar native agent

1. Build the project with ./gradlew bootJar

2. Run the project, see it start ups in ~1-2s

   java -jar build/libs/test-rollbar-2.0-SNAPSHOT.jar

3. Stop and re-run with the agent, see startup times 15-20s

   java -agentpath:./librollbar_java_agent.dylib -jar build/libs/test-rollbar-2.0-SNAPSHOT.jar

On Linux, use the .so:

java -agentpath:./librollbar_java_agent.so -jar build/libs/test-rollbar-2.0-SNAPSHOT.jar