[C++] Add accessors for termId and termOffset on exclusive publications.
[C++] Add accessors for termId and termOffset on exclusive publications.

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