Introduced --jpms option in jetty-start to run Jetty from the module-path.
Introduced [jpms] sections in *.mod files, to specify JPMS command line
options that needs to be added to the command line generated by jetty-start.
Bumped java.transaction-api to 1.3 because it has Automatic-Module-Name.
Fixed ASM version lookup using ManifestUtils.
Fixed WebInfConfiguration.findAndFilterContainerPaths() to properly
scan the module-path, which may contain both files and directories.
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>