Bug in pagination helper code

[Sukriti-sood]

In PAgination Helper Code :-

• There are some unnecessary variable used
• Logic for total pages is also wrong
  if (numDocs >= limit) { totalPages = Math.floor(numDocs / limit) + (numDocs % limit); }
• It was not filtering Opportunities On the Basis of Opportunity-Type.

This issue has been resolve in PR of GET API TEST #97