Better support for junit5 parameterised tests

[baev]

Context

Allure now detects junit test templates. For test templates test result name is set to concatenation of template's display name and invocation's display name. For example, the following test:

@ParameterizedTest
@ValueSource(strings = {"some value"})
void test(ArgumentType argumentValue) {...}

will be displayed as test(ArgumentType) [1] argumentValue=some value in the report.

This also allows usage of @DisplayName together with @ParameterizedTest (fixes #500):

@DisplayName("My named test")
@ParameterizedTest
@ValueSource(strings = {"some value"})
void test(ArgumentType argumentValue) {...}

will be displayed as My named test [1] argumentValue=some value in the report.

Besides that, all the parameters will be displayed correctly as well. Including support for new @Param annotation:

@ParameterizedTest
@ValueSource(strings = {"some value"})
void test(@Param("some parameter name") ArgumentType argumentValue) {...}

Checklist

• Sign Allure CLA
• Provide unit tests