Migrate report configuration from 2.3.0 to 2.4.0 structure

AT:

• a migration is added that maps the 2.3.0 report configuration structure to the explicitly modeled 2.4 structure
• 2.4.0 configuration property defaults are kept if there was no existing configuration
• compatible fields are taken over 1:1 if present in existing configuration
  • showInstanceCount, pointMarkers, precision, hideAbsoluteValue, hideRelativeValue, xLabel, yLabel, xml, columnOrder
• incompatible fields are mapped as described below

Mapping 2.3 => 2.4:
SingleProcessReport:

• color:
  • convert single array element into string (#1)

• hideRelativeValue
  • if visualization is heatmap, store inverted value as alwaysShowRelative (#2.1)

• hideAbsoluteValue
  • if visualization is heatmap, store inverted value as alwaysShowAbsolute (#2.1)

• targetValue.values
  • if visualization is heat and view is flow node duration: (#2.1.1)
    • store targetValue.values as heatmapTargetValue.values
    • use targetValue.active as heatmapTargetValue.active
  • if report visualization is line or bar and view property is frequency: (#2.2.1)
    • store target as value and isBelow in countChart
  • if report visualization is line or bar and view property is duration: (#2.2.2 )
    • store target as value, dateFormat as unit and isBelow as durationChart
  • if report is Count PI frequency grouped by none: (#2.3)
    • store baseline and target in countProgress
  • if report is PI Duration grouped by none: (#2.4)
    • store baseline and target in durationProgress

CombinedReport:

• color:
  • if it's a combined report, rename property to reportColors => won't do as we will refactor color location again with OPT-1862
• targetValue.values
  • if report visualization is line or bar or number and view property is frequency:* (#1.1)
    • store target as value and isBelow in countChart
  • if report visualization is line or bar or number and view property is duration:* (#1.2)
    • store target as value, dateFormat as unit and isBelow as durationChart

check the view property of the first report in the combined set