Generate KeyPair when user is created, return and verify
encrypted private key
Merge branch 'master' of ssh://git@github.com/tubav/fiteagle.git

Conflicts:
	core/src/main/java/org/fiteagle/core/aaa/CertificateAuthority.java
	core/src/main/java/org/fiteagle/core/userdatabase/UserDBManager.java
	core/src/test/java/org/fiteagle/core/userdatabase/UserDBManagerTest.java
	core/src/test/java/org/fiteagle/core/userdatabase/UserDBTest.java