Update Java SDK Examples in API Reference Pages

[m-a-r-1912]

Several of the Java SDK examples in the API Reference documentation aren't correct according to the current SDK code.

For instance, the Trigger Event doc has a Java example in which triggerEvent(event) accepts a HashMap as its argument. However, in the current SDK code, the triggerEvent(event) method actually requires a TriggerEventRequest as its parameter.

There are similar discrepancies in the other doc pages.

These examples should be updated to reflect how to use the current Java SDK.

[jainpawan21]

@m-a-r-1912 Assigned this to you!

[m-a-r-1912]

Thanks, I've started working on this