* Made XDatabaseContext inherit XDatabaseRegistrations non-optionally, adapted
call-sites to just use XDatabaseContext w/o querying. (The previous commit
had inadvertantly effectively removed support for XDatabaseRegistrations from
the ODatabaseContext implementation, as an optional UNO super-interface does
not lead to a super-class in the corresponding C++ class hierarchy, but making
the super-interface non-optional fixes that anyway.)
* Adapted some more call-sites to just use XDatabaseContext w/o querying.
* Added @since tag.
* Replaced new uses of comphelper::ComponentContext::getUNOContext with
comphelper::getComponentContext (see 03a9f139bd
"ComponentContext::getUnoContext -> getComponentContext simplification;" I
intend to get rid of comphelper/componentcontext.hxx much sooner than of
comphelper/processfactory.hxx).
Change-Id: I68d09f2dbe651629f79ed21cd40cdb6d6b32c624
a00c4e02ac