Update OAuth20ProfileController.java

if the access token is not in the request parameters, look for a bearer token in the authorization header
Update OAuth20ProfileController.java

declaring authHeader final to fix checkstyle error
Update OAuth20ProfileController.java

Use StringUtils.isNotBlank instead of null check.
Update OAuth20ProfileControllerTests.java

Added OK test with Authorization header
Update OAuth20ProfileControllerTests.java

Fix to use addHeader() instead of setHeader()
Update OAuthConstants.java

Add constant for bearer tokens
Update OAuth20ProfileController.java

Use the OAuthConstants for bearer token
Update OAuth20ProfileController.java

typo when switching to StringUtils.isNotBlank
Merge pull request #721 from mikeroda/master

Update OAuth20ProfileController:  bearer tokens in the authorization header