Cleaner API changes descriptions in JavaDoc (SonarSource#2490)

SONARJAVA-3042 Fix performance issue when loading class (SonarSource#…

…2440)

SONARJAVA-3022 Handle unexpected exceptions while parsing XML files (S…

…onarSource#2401)

Setup different date for sonarpedia and allow release

SONARJAVA-2962 Update rules metadata (SonarSource#2381)

Update sonarpedia date

Prepare for release 5.9.1 (SonarSource#2321)

SONARJAVA-2943 Rule S2139: Exceptions should be either logged or reth…

…rown but not both (SonarSource#2313)

SONARJAVA-2788 Exclude S1610 for @autovalue, @Value.Immutable

Update S2755 rule description