Removed unnecessary options merging with each util function.

[VShingala]

Overview

This PR fixes issue where we were merging options when not needed due to all APIs now using SchemaPack which by default in it's constructor determines options to be used.

Ref:

openapi-to-postman/lib/schemapack.js

Line 61 in b4ef1dc

this.computedOptions = utils.mergeOptions(

One of such instance was in getRefObject() which recursively resolves reference. This caused the merge operation to be done every single time a reference is resolved which is not required at all.

Apart from this, in cases when there were circular reference in non-schema $ref, we were resolving them without recursion break points. We'll be now making sure that we resolve circular $ref correctly.

We've removed all instance of merging of these options with default ones in SchemaUtils.js file and also fixed tests accordingly which were relying on this logic to be there.

[dhwaneetbhatt]

@VShingala will this change be compatible with both v1 and v2 interface version?

[VShingala]

@VShingala will this change be compatible with both v1 and v2 interface version?

@dhwaneetbhatt For v2 interface, we are not doing this and always using constuctor defined options always so this change is not needed for v2 interface.

[VShingala]

@dhwaneetbhatt Will need a second review with latest change. I've also updated the description with second set of fix.