Update lightstreamer image

Switch lightstreamer from "jdk" to "jre", adjust tags

library/lightstreamer

@@ -1,5 +1,6 @@
 # maintainer: Lightstreamer Server Development Team <[email protected]> (@lightstreamer)
 
-latest: git://github.com/Lightstreamer/Docker@0d3270ca3d37ba33a1ec693920e9856f90f8276a 6.0.1_20150730
-6.0.1_20150730: git://github.com/Lightstreamer/Docker@0d3270ca3d37ba33a1ec693920e9856f90f8276a 6.0.1_20150730
-
+6.0.1: git://github.com/Lightstreamer/Docker@bc07c14a87843fbc9baed08dfab416ac1f20554e 6.0
+6.0: git://github.com/Lightstreamer/Docker@bc07c14a87843fbc9baed08dfab416ac1f20554e 6.0
+6: git://github.com/Lightstreamer/Docker@bc07c14a87843fbc9baed08dfab416ac1f20554e 6.0
+latest: git://github.com/Lightstreamer/Docker@bc07c14a87843fbc9baed08dfab416ac1f20554e 6.0