Tests no longer run with whitespace in Solr's checkout directory

   [junit4] ERROR   0.00s J3 | SearchHandlerTest (suite) <<<
   [junit4]    > Throwable #1: java.security.AccessControlException: access denied ("java.io.FilePermission" "C:\Users\Uwe%20Schindler\Projects\lucene\trunk-lusolr1\solr\core\src\test-files\log4j2.xml" "read")
   [junit4]    >        at java.base/java.security.AccessControlContext.checkPermission(AccessControlContext.java:472)
   [junit4]    >        at java.base/java.security.AccessController.checkPermission(AccessController.java:895)
   [junit4]    >        at java.base/java.lang.SecurityManager.checkPermission(SecurityManager.java:322)
   [junit4]    >        at java.base/java.lang.SecurityManager.checkRead(SecurityManager.java:661)
   [junit4]    >        at java.base/java.io.File.exists(File.java:815)
   [junit4]    >        at org.apache.logging.log4j.core.util.FileUtils.fileFromUri(FileUtils.java:88)
   [junit4]    >        at org.apache.logging.log4j.core.config.ConfigurationSource.fromResource(ConfigurationSource.java:281)
   [junit4]    >        at org.apache.logging.log4j.core.config.ConfigurationFactory$Factory.getConfiguration(ConfigurationFactory.java:449)
   [junit4]    >        at org.apache.logging.log4j.core.config.ConfigurationFactory$Factory.getConfiguration(ConfigurationFactory.java:386)
   [junit4]    >        at org.apache.logging.log4j.core.config.ConfigurationFactory.getConfiguration(ConfigurationFactory.java:261)
   [junit4]    >        at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:616)
   [junit4]    >        at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:637)
   [junit4]    >        at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:231)
   [junit4]    >        at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:153)
   [junit4]    >        at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
   [junit4]    >        at org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
   [junit4]    >        at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:121)
   [junit4]    >        at org.apache.logging.slf4j.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:43)
   [junit4]    >        at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:46)
   [junit4]    >        at org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:29)
   [junit4]    >        at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:358)
   [junit4]    >        at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:383)
   [junit4]    >        at org.apache.solr.SolrTestCase.<clinit>(SolrTestCase.java:66)
   [junit4]    >        at java.base/java.lang.Class.forName0(Native Method)
   [junit4]    >        at java.base/java.lang.Class.forName(Class.java:398)
   [junit4] Completed [1/907 (1!)] on J3 in 1.73s, 0 tests, 1 error <<< FAILURES!