Naming of JSON Merge Patch Components

[kennethmugo]

According to RFC7386, JSON Merge Patch is the correct naming of merge patch operations. In the library the components used to achieve this functionality, however, are named in a manner that conveys the operations as JSON Patch Merge instead. For example JsonPatchMergeDocument should be JsonMergePatchDocument to be inline with the standard. This naming convention should be adjusted to be in line with the standard to avoid any confusion.