SONAR-4357 Replace model TECHNICAL_DEBT by SQALE and replace metric 'technical_debt' by 'sqale_index'
SONAR-4738 New migration script
Add 5 seconds to prevent false positives
SONAR-4753 Compute the new "Technical Debt Density" metric
SONAR-4717 Add technical_debt_density in Technical Debt widget
SONAR-4754 Update default dashboard to add the "Technical Debt" widget
SONAR-4752 Update message
SONAR-4755 Remove the rules compliance index from the "Rules Compliance" widget