Summary: Removes unnecessary imports and adds missing Override annotations
Reviewed-by: xuelei
Contributed-by: NFlorian Weimer <fweimer@redhat.com>

7096937: TEST: com/sun/net/ssl/internal/ssl/GenSSLConfigs/main.java need modification as a result of TLS fix
Reviewed-by: wetmore, jdn, xuelei

Reviewed-by: xuelei
Contributed-by: nsebastian.sickelmann@gmx.de

6985179: To support Server Name Indication extension for JSSE client
Summary: Introduces the algorithm constraints to support signature and hash algorithm selection. Includes contributions from wetmore and weijung.
Reviewed-by: wetmore, weijun

Reviewed-by: darcy, weijun