Feature request: colorize badges for measures that are part of the quality gate

[ganncamp]

ideally:

• Red for values causing QG failure
• Orange for values in the Warning range of a QG whether the QG is in Warning or Error state
• Green or grey for passing values that are included in the QG whether or not the QG is in Warning or error state

[pawlakm]

Implementation details:

• prerequisites: 2.0.1 needs to be released
• in MeasuresBadgeRequestHandler.handle() call api/qualitygates/project_status with projectKey parameter in order to retrieve the QG for the project.
• parse conditions
• for each condition, check if metricpassed to the measure badge WS is equal to metricKey.
• if yes, after having built a MeasureHolder set its background color using MeasureHolder.setBackgroundColor(SVGImageColor) based on status value (OK -> GREEN, KO -> RED, WARN -> ORANGE)
• else do nothing (defaults to GRAY)

Out of scope (another issues need to be created in order to handle these) :

• add cache for generated badges (cache strategy needs to be defined: by project, platform based, TTL, etc.)
• add cache for QG status data (call the WS only if the QG status for the project hasn't been refreshed for X minutes)
• share QG status cache with QG badges WS

[pawlakm]

fixed in branch colorise-measures-badges