Daniel Rule

Fix for null pointer error when built & run on CentOS7/JDK8 Exception in thread "main" java.lang.NullPointerException at SolrLogReader.getFiles(SolrLogReader.java:306) at SolrLogReader.getFiles(SolrLogReader.java:312) at SolrLogReader.summarize(SolrLogReader.java:189) at SolrLogReader.main(SolrLogReader.java:73)

Updated note about hdfs directories to reflect latest code changes.

Another spot where it was saying -t and -b only apply to cdh/cdp

Looks like README.md needs to be updated not to state that -t and -b are only for cdh/cdp but also for hdp/hdf per line 92 https://github.com/cloudera/cloudera-scripts-for-log4j/blob/main/run_log4j_patcher.sh