i1027: corrected asynchronous debugging output messages.

[clevengr]

Description of what the PR does

Cherry-picks commit 32f18fa from branch i1027 to merge corrections fixing the incorrect logging of asynchronous operations in app.component.ts.

Issue which the PR addresses

Fixes #1086

Environment in which the PR was developed (OS,IDE, Java version, etc.)

Windows 10, Eclipse 2021-12, Java "1.8.0_381"

Precise steps for testing the PR:

• Start a contest (e.g. sumithello)
• Start a WTI Server
• Login as a team using the WTI client
• Open the browser console window
• Examine the console log messages
  • verify that the messages include logging calls to loadEnvironment() BUT they do not display any actual environment values at that point;
  • verify that there are subsequent messages indicating "Received callback from asynchronous HttpClient.get();" followed by actual environment values.
• Hit F5; repeat the above verification steps.

[johnbrvc]

Looks good. Local testing seems to indicate it prints what it should.

[kkarakas]

Changes make sense to me. Didn't run it yet.