Rename and restructure test-related tasks
Rename and restructure test-related tasks

The Gulp task runner seems to hide composed tasks, such as those
returned by gulp.series() and gulp.parallel(), when they are stored in a
function variable unless they are invoked directly from the command
line.  For example, in this project, running "gulp test" will display
"test", "beforeTest", and "coreTest".  However, running the default task
via just "gulp" will only display "beforeTest" and "coreTest".

By changing the gulp.series(...) call that represents the test task from
a function variable to a named function, we get the benefit of the test
task always being output to the console by the task runner.  This now
provides consistent output between "gulp test" and "gulp".

ssoloff/hazelslack-server-core