ReconcilerTests.testBug36032* need the indexer

Running ReconcilerTests in isolation (i.e., outside AllJavaModelTests) hangs in testBug36032a(), stacktrace is:
```
at java.lang.Thread.sleep(java.base@11.0.2/Native Method)
at org.eclipse.jdt.core.tests.model.ReconcilerTests.assertNoProblem(ReconcilerTests.java:191)
at org.eclipse.jdt.core.tests.model.ReconcilerTests.testBug36032a(ReconcilerTests.java:3921)
```

In the debugger I can see four jobs in `JobManager#awaitingJobs`, but due to `TestCase#indexDisabledForTest` being true, the index manager is disabled in `setUp()`.