Updating Buck files to build OSGi jars

- Using osgi_jar for all modules except apps
- Adding target for installation of core modules to .m2 repo

Change-Id: I65d9e3a9567918e275191724842d7d9b1f485128
diff --git a/protocols/pcep/api/BUCK b/protocols/pcep/api/BUCK
index a3f344e..83c98ae 100644
--- a/protocols/pcep/api/BUCK
+++ b/protocols/pcep/api/BUCK
@@ -8,7 +8,7 @@
     '//protocols/pcep/pcepio:onos-pcep-pcepio',
 ]
 
-java_library(
+osgi_jar(
     name = CURRENT_NAME,
     srcs = glob([SRC + '/*.java']),
     deps = COMPILE_DEPS,