Initial revision of gmt BedToIntervalList wrapper for Picard tool.

Initial revision of gmt BedToIntervalList wrapper for Picard tool.

The hard-coded path to picard 1.123 should be removed once @iferguson90 changes are made to G:M:T::Picard related to package name changes for version 1.123
Since only the sorted version is used in the test, could we take the initial version out of the repo?