fix(client): default client fallback with redirection to all default directory files

[knagaitsev]

• This is a bugfix
• This is a feature
• This is a code refactor
• This is a test update
• This is a docs update
• This is a metadata update

For Bugs and Features; did you add new tests?

Motivation / Use-Case

Fix#2006,

Fix problems introduced by #2015

I made a redirect to each file in the default directory, because it's better to be safe I think.

Breaking Changes

None

Additional Info

[codecov]

Codecov Report

Merging #2049 into master will decrease coverage by 0.66%.
The diff coverage is n/a.

@@ Coverage Diff @@## master #2049 +/- ##
==========================================
- Coverage 92.77% 92.11% -0.67% 
==========================================
Files 29 20 -9 Lines 1149 875 -274 Branches 327 273 -54 ==========================================
- Hits 1066 806 -260 + Misses 79 66 -13 + Partials 4 3 -1

Impacted Files	Coverage Δ
client-src/default/utils/createSocketUrl.js
client-src/clients/SockJSClient.js
client-src/default/utils/reloadApp.js
client-src/default/utils/getCurrentScriptSource.js
client-src/clients/BaseClient.js
client-src/default/utils/log.js
client-src/default/index.js
client-src/default/utils/sendMessage.js
client-src/default/overlay.js

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[knagaitsev]

@evilebottnawi@hiroppy Here is a fix.

If you revert the previous fix, I will just rebase and fix any problems that result from that.

[knagaitsev]

Also I should add tests to make sure all the redirection are correct.

Would it make more sense if test/client tested files in the client directory, rather than the client-src directory, since client directory is what users will actually use? If we switched to this method, I could simply point those tests towards the redirection files that I create in this PR, and it would confirm that they work.

[knagaitsev]

The change I just made makes the client tests use client directory, rather than client-src. Those are the files that the dev server and users use, so they should be tested. The unit tests pass through the redirection files that I added to each individual client file, confirming that they work.

This fix spans more than I expected, but probably is safer than other solutions.

Edit:

Just to explain more, I changed the tests so that the test mocks will mock the files in the client/default directory, since this is where those files actually interact with one another. In the client directory, we simply have the "redirection" files that do something like module.exports = require('./default/index'). Whenever there is a require in a client unit test, I require those "redirection" files, confirming that redirection works, then those redirection files go on to call the mock files.

[knagaitsev]

Closing in favor of #2069