classpath's JRE container and execution enviroment's one does not fit
Fix "The JRE container on the classpath is not a perfect match to the
'J2SE-1.5' execution environment" for org.openhab.io.transport.serial.
Fix "The JRE container on the classpath is not a perfect match to the
'JavaSE-1.7' execution environment" for org.openhab.core.init and
org.openhab.core.
Signed-off-by: Markus Rathgeb <maggu2810@gmail.com>