Pubmatic: Contribute vendor details for Prebid server adapter

[pm-priyanka-deshmane]

Type of change

• Feature

Description of change

This is to contribute OpenWrap as a vendor for Prebid server adapter.
When publisher will use openwrap as defaultVendor, it will include options in the config with vendor’s default values, e.g. adapter, timeout, endpoint.
Example:

s2sConfig: {
          enabled: true,
          bidders: ['pubmatic'],
          defaultVendor: 'openwrap',
          extPrebid: { 
		bidderparams: {
              		pubmatic: {
                		publisherId: publisherId,
                		wrapper: {
                  			profileid: profileId,
                  			versionid: versionId