Add methods to stream generated rows directly to file

[labkey-tchad]

Rationale

TestDataGenerator had a method for streaming rows directly to a file. I removed it without understanding the consequences. I've reintroduced and expanded that functionality.

java.lang.OutOfMemoryError: Java heap space
  at java.base/java.util.HashMap.newNode(HashMap.java:1901)
  at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1232)
  at org.labkey.remoteapi.collections.CaseInsensitiveHashMap.put(CaseInsensitiveHashMap.java:98)
  at org.labkey.remoteapi.collections.CaseInsensitiveHashMap.putAll(CaseInsensitiveHashMap.java:128)
  at org.labkey.remoteapi.collections.CaseInsensitiveHashMap.<init>(CaseInsensitiveHashMap.java:32)
  at org.labkey.test.util.TestDataGenerator.addCustomRow(TestDataGenerator.java:372)
  at org.labkey.test.util.TestDataGenerator.generateRows(TestDataGenerator.java:409)
  at org.labkey.test.tests.assay.UploadLargeExcelAssayTest.testUpload200kRows(UploadLargeExcelAssayTest.java:88)

Related Pull Requests

• Update test helpers to understand field keys and names #2450

Changes

• Add methods to stream generated rows directly to file