1. replace deprecated ioutil functions (ioutil is deprecated since Go 1.16)
2. fix variable names that collide with imported package name
3. fix typos
Signed-off-by: Tommy TIAN <xtianae@connect.ust.hk>
Split boiler-plate connection code into a separate file since the basic sample already covers this aspect. The `app.go` file now only presents the main application code, making it much easier for readers to view.
Also changed the event replay code to use a different style of reading from the real-time eventing example, demonstrating the use of timeouts while reading events we expect to arrive quickly, and avoiding any possibility of the main application execution hanging indefinitely.
Signed-off-by: Mark S. Lewis <mark_lewis@uk.ibm.com>
