Change test-QueuePlugin.mjs to test-Plugin.mjs and Tests Fail

[gauntface]

I changes test-QueuePlugin.mjs to test-Plugin.mjs as part of #1084 but it causes tests to fail. For now I've just kept the file name as is.

Log of failing tests:

16 passing (1s)
  11 failing

  1) [workbox-background-sync] Queue
       addRequest
         should serialize the request and store it in IndexedDB:
     NotFoundError: IDBTransaction.objectStore(): Object store 'requests' does not exist
      at IDBTransaction.objectStore (/home/matt/Projects/Code/workbox/node_modules/shelving-mock-indexeddb/lib/mock.js:295:33)
      at Promise (/home/matt/Projects/Code/workbox/packages/workbox-core/_private/DBWrapper.mjs:117:1047)
      at new Promise (<anonymous>)
      at DBWrapper.transaction (/home/matt/Projects/Code/workbox/packages/workbox-core/_private/DBWrapper.mjs:117:154)
      at <anonymous>

  2) [workbox-background-sync] Queue
       addRequest
         should register to receive sync events for a unique tag:

      AssertionError: expected false to be true
      + expected - actual

      -false
      +true

      at Context.<anonymous> (test/workbox-background-sync/node/lib/test-Queue.mjs:145:63)
      at <anonymous>

  3) [workbox-background-sync] Queue
       addRequest
         should invoke the requestWillEnqueue callback:
     NotFoundError: IDBTransaction.objectStore(): Object store 'requests' does not exist
      at IDBTransaction.objectStore (/home/matt/Projects/Code/workbox/node_modules/shelving-mock-indexeddb/lib/mock.js:295:33)
      at Promise (/home/matt/Projects/Code/workbox/packages/workbox-core/_private/DBWrapper.mjs:117:1047)
      at new Promise (<anonymous>)
      at DBWrapper.transaction (/home/matt/Projects/Code/workbox/packages/workbox-core/_private/DBWrapper.mjs:117:154)
      at <anonymous>

  4) [workbox-background-sync] Queue
       addRequest
         should support modifying the stored request via requestWillEnqueue:

      AssertionError: expected false to be true
      + expected - actual

      -false
      +true

      at Context.<anonymous> (test/workbox-background-sync/node/lib/test-Queue.mjs:177:50)
      at <anonymous>

  5) [workbox-background-sync] Queue
       replayRequests
         should try to re-fetch all requests in the queue:

      AssertionError: expected 0 to equal 3
      + expected - actual

      -0
      +3

      at Context.<anonymous> (test/workbox-background-sync/node/lib/test-Queue.mjs:203:39)
      at <anonymous>

  6) [workbox-background-sync] Queue
       replayRequests
         should remove requests after a successful retry:

      AssertionError: expected 0 to equal 3
      + expected - actual

      -0
      +3

      at Context.<anonymous> (test/workbox-background-sync/node/lib/test-Queue.mjs:244:39)
      at <anonymous>

  7) [workbox-background-sync] Queue
       replayRequests
         should ignore (and remove) requests if maxRetentionTime has passed:

      AssertionError: expected false to be true
      + expected - actual

      -false
      +true

      at Context.<anonymous> (test/workbox-background-sync/node/lib/test-Queue.mjs:272:42)
      at <anonymous>

  8) [workbox-background-sync] Queue
       replayRequests
         should keep a request in the queue if re-fetching fails:

      AssertionError: expected 0 to equal 2
      + expected - actual

      -0
      +2

      at Context.<anonymous> (test/workbox-background-sync/node/lib/test-Queue.mjs:300:33)
      at <anonymous>

  9) [workbox-background-sync] Queue
       replayRequests
         should re-register for a sync event if re-fetching fails:

      AssertionError: expected false to be true
      + expected - actual

      -false
      +true

      at Context.<anonymous> (test/workbox-background-sync/node/lib/test-Queue.mjs:324:63)
      at <anonymous>

  10) [workbox-background-sync] Queue
       replayRequests
         should invoke all replay callbacks:

      AssertionError: expected false to be true
      + expected - actual

      -false
      +true

      at Context.<anonymous> (test/workbox-background-sync/node/lib/test-Queue.mjs:344:50)
      at <anonymous>

  11) [workbox-background-sync] Queue
       replayRequests
         should support modifying the request via the requestWillReplay:

      AssertionError: expected false to be true
      + expected - actual

      -false
      +true

      at Context.<anonymous> (test/workbox-background-sync/node/lib/test-Queue.mjs:414:43)
      at <anonymous>

I'm not sure what the issue is or why they would affect each other, but would be good to rename the file to match the source file.