changed type of parameters from rtl_uString to OUString

changed type of several parameters of the functions
jfw_plugin_getAllJavaInfos and jfw_plugin_getJavaInfoByPath
from rtl_uString to OUString

Change-Id: I80feb311542e6ccded9f9924f800c75a7e14a1e7
Signed-off-by: Stephan Bergmann <sbergman@redhat.com>