appendLocatorParam function in odspURLResolverForShareLink

[pragya91]

• New utility function in odspUrlResolverForShareLink class of odsp-driver which can add locator parameter (nav param) to the base url provided as an input to the function.
• One of the immediate use-cases for this utility is that when the host application has a sharing link (say generated from using the SingleRT feature), the host application can create a re-loadable link to the fluid component by calling this utility. Up until now, the host apps had to rely on the getAbsoluteUrl method, which was not ideal as it made a network call to odsp to get the absolute url for the resource.
• Added tests as well to test the complete resolvedUrl information is preserved in the nav param, and to test that no other params are disturbed in the original url provided.