[Java] Format debug output of counters to be like AeronStat.
[Java] Format debug output of counters to be like AeronStat.

galderz/Aeron,EvilMcJerkface/Aeron,mikeb01/Aeron,mikeb01/Aeron,galderz/Aeron,mikeb01/Aeron,real-logic/Aeron,galderz/Aeron,EvilMcJerkface/Aeron,EvilMcJerkface/Aeron,real-logic/Aeron,galderz/Aeron,EvilMcJerkface/Aeron,real-logic/Aeron,real-logic/Aeron,mikeb01/Aeron