enable sunec (ref #6809)

S8138725: Add options for Javadoc generation
S8140353: Improve signature checking
S8151934, CVE-2017-3231: Resolve class resolution
S8156804, CVE-2017-3241: Better constraint checking
S8158406: Limited Parameter Processing
S8158997: JNDI Protocols Switch
S8159507: RuntimeVisibleAnnotation validation
S8161218: Better bytecode loading
S8161743, CVE-2017-3252: Provide proper login context
S8162577: Standardize logging levels
S8162973: Better component components
S8164143, CVE-2017-3260: Improve components for menu items
S8164147, CVE-2017-3261: Improve streaming socket output
S8165071, CVE-2016-2183: Expand TLS support
S8165344, CVE-2017-3272: Update concurrency support
S8166988, CVE-2017-3253: Improve image processing performance
S8167104, CVE-2017-3289: Additional class construction refinements
S8167223, CVE-2016-5552: URL handling improvements
S8168705, CVE-2016-5547: Better ObjectIdentifier validation
S8168714, CVE-2016-5546: Tighten ECDSA validation
S8168728, CVE-2016-5548: DSA signing improvments
S8168724, CVE-2016-5549: ECDSA signing improvments