Restructure tests

[drmarjanovic]

Description:

As an example, you can take a look at the ElasticQuerySpec.

The basic idea is to have a simple structure and description of the tests and combine them with the && operator.

The following specs should be restructured:

• [x] FieldDSLSpec
• [x] HighlightsSpec
• [x] IndexNameSpec
• [x] ScriptSpec
• [x] HttpElasticExecutorSpec
• [ ] HttpExecutorSpec

[mihajlo-ra92]

Refactoring HighlightsSpec

[filipmilo]

Refactoring IndexNameSpec

[saksofon997]

Refactoring ScriptSpec

[saksofon997]

Refactoring FieldDSLSpec

[mihajlo-ra92]

Refactoring HttpElasticExecutorSpec