Revert "Make GlobusGSSCredentialImpl honour its Serializable identifier."

This reverts commit ac43a4bdd59ced7e9e30de80fb8aec28cca660fe.

Conflicts:
	gss/src/main/java/org/globus/gsi/gssapi/GlobusGSSCredentialImpl.java
	ssl-proxies/src/main/java/org/globus/gsi/OpenSSLKey.java
	ssl-proxies/src/main/java/org/globus/gsi/X509Credential.java
	ssl-proxies/src/main/java/org/globus/gsi/bc/BouncyCastleOpenSSLKey.java
	ssl-proxies/src/test/java/org/globus/gsi/OpenSSLKeyTest.java
Do not compile ioby default as it uses gram tests...