Change logic for detecting categorical variables

Basically the client now has to send this information.
Merge branch 'master' into features/boxplot_multivar
Tests: stubbing of core-db services into sep class
Remove redundant argument
Give warning if not for at least 2 subjects both aCGH and survival time observations are available
Add another helper to ConfiguratorTestsHelper

List<ClinicalVariableColumn>
    createClinicalVariableColumns(List<String> conceptPaths,
                                  boolean needsLabel = false)
BoxPlot: add support for mult numeric clin vars
To add flags for both dependent and independent variables whether they are categorical or non-categorical.
Fix comment rot
Merge pull request #13 from thehyve/features/boxplot_multivar

Features/boxplot multivar
Moved mocking helper to helper class
Verify numeric clin vars have only numeric data
Merge pull request #14 from thehyve/check_numeric

Verify numeric clin vars have only numeric data
Fix BoxPlot bug related to binning

Treat binned variables the same way as categorical variables.
Merge pull request #15 from thehyve/bug/binning_boxplot

Fix BoxPlot bug related to binning
Merge branch 'master' into survival_analysis_refactored

Conflicts:
	src/groovy/jobs/steps/helpers/OptionalBinningColumnConfigurator.groovy