[BAEL-1410] Spring Boot OAuth2 Support (#3409)

* initial setup with spring boot/ spring data jpa/ flyway

* BAEL-1315 - added flyway test extensions for spring

* BAEL-1315 - added flyway test extensions for spring

* BAEL-1315 - created multiple migration scripts and locations

* BAEL-1315 - test insert after schema creation

* cleanup

* BAEL-1315 - test data changes by a migration

* [BAEL-1410] Spring Boot Security Auto-Configuration

* [BAEL-1410] Added some tests for incorrect credentials use case

* [BAEL-1410] Added readme and some code improvements

* [BAEL-1410] removed form based auth config because is redundant
added oauth2 server auto-configuration sample with test

* [BAEL-1410] added custom Authorization Server Config

* [BAEL-1410] update README

* [BAEL-1410]refactor tests

* [BAEL-1410]oauth2 resource server

* [BAEL-1410]oauth2 sso sample with facebook

* [BAEL-1410]remove spring-flyway

spring-boot-security/README.md

@@ -1,6 +1,8 @@
 ### Spring Boot Security Auto-Configuration
 
 - mvn clean install 
-- uncomment in application.properties spring.profiles.active=basic # for basic auth config
-- uncomment in application.properties spring.profiles.active=form # for form based auth config
-- uncomment actuator dependency simultaneously with the line from main class
+- uncomment actuator dependency simultaneously with the line from basic auth main class
+- uncomment security properties for easy testing. If not random will be generated.
+
+### CURL commands
+- curl -X POST -u baeldung-admin:baeldung -d grant_type=client_credentials -d username=baeldung-admin -d password=baeldung http://localhost:8080/oauth/token