PRD-4348: Expose the current chart expression as predefined variable in the chart's post-processing script.
Fixing test cases: Mondrian now produces a 'format-string' property on cell-members.
Fixing test cases: Added test-output generators
Fixing test cases: Iteration order for hashmaps changed from JDK1.6 to 1.7, which blows up our tests. Sorting keys before iterating to work around this issue. Regenerate test output for new order.
Fixing test cases: Add sql-logs to ignored list. Removed bogus file-output.