fix Delegations hashCode generation (issue #8)

added --resourceID command-line argument

added --resourceID command-line argument to cadc-cdp and cadc-cert-gen; removed --cred arg from cadc-cert-gen

proposed fix for CertificateDAO and DelegationsImpl

fix SQL generation to explicitly use provided database name; re-org DB related code into single class

initial as-is source release of cadc-cert-gen

s1970: added gradle application plugin

added CredUtil for typical servers-side usage pattern

downgraded spring dependency to 2.5.6; added CredUtil to cadc-cdp to support typical server-side usage

changed module names to lower-case and group to org.opencadc to conform to maven repo naming standards

S1965