reproducible failures for TestDynamicLoading (thai locale)

ant test  -Dtestcase=TestDynamicLoading -Dtests.method=testDynamicLoading -Dtests.slow=true -Dtests.locale=th_TH_TH_#u-nu-thai -Dtests.asserts=true

   [junit4]   2> NOTE: reproduce with: ant test  -Dtestcase=TestDynamicLoading -Dtests.method=testDynamicLoading -Dtests.seed=18AA725A2C84FD9 -Dtests.slow=true -Dtests.locale=th_TH_TH_#u-nu-thai -Dtests.timezone=Asia/Hovd -Dtests.asserts=true -Dtests.file.encoding=UTF-8
   [junit4] FAILURE 49.5s J2 | TestDynamicLoading.testDynamicLoading <<<
   [junit4]    > Throwable #1: java.lang.AssertionError: Could not get expected value  'org.apache.solr.core.RuntimeLibReqHandler' for path 'overlay/requestHandler/\/runtime/class' full output: {
   [junit4]    >   "responseHeader":{
   [junit4]    >     "status":0,
   [junit4]    >     "QTime":0},
   [junit4]    >   "overlay":{
   [junit4]    >     "znodeVersion":1,
   [junit4]    >     "runtimeLib":{"colltest":{
   [junit4]    >         "name":"colltest",
   [junit4]    >         "version":1}},
   [junit4]    >     "requestHandler":{"/test1":{
   [junit4]    >         "name":"/test1",
   [junit4]    >         "class":"org.apache.solr.core.BlobStoreTestRequestHandler",
   [junit4]    >         "runtimeLib":true}}}}
   [junit4]    > 	at __randomizedtesting.SeedInfo.seed([18AA725A2C84FD9:D9C78A725515EA79]:0)
   [junit4]    > 	at org.apache.solr.core.TestSolrConfigHandler.testForResponseElement(TestSolrConfigHandler.java:399)
   [junit4]    > 	at org.apache.solr.core.TestDynamicLoading.testDynamicLoading(TestDynamicLoading.java:172)
   [junit4]    > 	at org.apache.solr.BaseDistributedSearchTestCase$ShardsRepeatRule$ShardsFixedStatement.callStatement(BaseDistributedSearchTestCase.java:958)
   [junit4]    > 	at org.apache.solr.BaseDistributedSearchTestCase$ShardsRepeatRule$ShardsStatement.evaluate(BaseDistributedSearchTestCase.java:933)
   [junit4]    > 	at java.lang.Thread.run(Thread.java:745)

java version "1.8.0_40"
Java(TM) SE Runtime Environment (build 1.8.0_40-b25)
Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode)