Make ConvertWith applicable to a larger scope

[asarkar]

Currently ConvertWith only applies to a single parameter, so, a method using the same converter more than once becomes extremely verbose.

void testMostVisitedPattern(
  @ConvertWith(IterableConverter.class) String[] username,
  @ConvertWith(IterableConverter.class) int[] timestamp,
  @ConvertWith(IterableConverter.class) String[] website,
  @ConvertWith(IterableConverter.class) List<String> expected) {...}

Deliverables

• Make ConvertWith applicable to a method such that if no other converter is found or specified for a parameter, the method-level converter will be used.
• Alternatively, provide a way to register converters globally, akin to what the Spring Framework does.