Add tie-breaking procedure

[gtsherman]

It is possible for more than one parameter setting to tie during the training phase. A tie during the training phase does not, however, imply a tie during the test phase.

Currently, the framework seems to be selecting the first parameter setting alphanumerically, which is essentially random. Instead, to resolve a tie we should:

• Remove one query (randomly) until the tie is broken
• If the tie isn't broken, randomly select from the list if ties