There is inconsistent usage of toLowerCase/toUpperCase methods in the codebase.
Somewhere we already use Locale.US, somewhere not. That might cause various issues in runtime
as shown in CASSANDRA-19953 ticket when an environment Cassandra runs in has different locale from expected.
In this patch, all such method calls explicitly set their locale to Locale.US. This patch also contains
a checkstyle rule which fails the compilation if toLowerCase or toUpperCase is used.
We prefer calls to methods in LocalizeString class which use US locale.
patch by Ata İlhan Köktürk; reviewed by Stefan Miklosovic, Brandon Williams for CASSANDRA-19953
Co-authored-by: Maxwell Guo <cclive1601@gmail.com>
Co-authored-by: Stefan Miklosovic <smiklosovic@apacheorg>
Maxim Muzafarov