Added constants for OpenId redirect uris (live/sandbox)
Changed HTTP Header additions from addRequestProperty to setRequestProperty
Changed "SunX509" algorithm name KeyManagerFactory.getDefaultAlgorithm()
Created a method getAuthorizationHeader() that computes Basic Authorization token
Fixed if else to if elseif ladder in formatURIPath method. Applied URLEncoding for query parameters
Added headersMap values in property to the getHeadersMap() return Map
Updated OpenId classes to retrieve ClientId and ClientSecret from ClientCredentials class
Updated version from 1.4.4 to 1.4.5
Merge pull request #18 from paypal/openid-connect-fix

Openid connect fix