[cwiki] Added Enum documentation and fix newline problem for description

[saschagrebe]

I recognized that enums are not documented well in confluence wiki markup. Therefore I created this PR which renders the enum values as a table in the model section. Additionaly I removed the escaping of values to make sure the text is displayed correctly in wiki (i. e. " instead of " or with multiline comments).

Input:

FooType:
  description: >
    A simple enum with:
    * Multiline description
    * Enum value
    * Enum description
  type: string
  enum:
  - "F-Code"
  x-enum-varnames:
  - FOO
  x-enum-descriptions:
  - The amazing foo enum

Output:

h3. FooType

A simple enum with:
* Multiline description
* Enum value
* Enum description

||Name||Value||Description||
|FOO |"F-Code" |The amazing foo enum |

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