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/providers/bgp/cfg/BUCK b/providers/bgp/cfg/BUCK
index 8c5b713..3156e95 100644
--- a/providers/bgp/cfg/BUCK
+++ b/providers/bgp/cfg/BUCK
@@ -8,7 +8,7 @@
     '//protocols/bgp/api:onos-bgp-api',
 ]
 
-java_library(
+osgi_jar(
     name = CURRENT_NAME,
     srcs = glob([SRC + '/*.java']),
     deps = COMPILE_DEPS,
diff --git a/providers/bgp/flow/BUCK b/providers/bgp/flow/BUCK
index b900d14..ba18ec5 100644
--- a/providers/bgp/flow/BUCK
+++ b/providers/bgp/flow/BUCK
@@ -8,7 +8,7 @@
     '//protocols/bgp/api:onos-bgp-api',
 ]
 
-java_library(
+osgi_jar(
     name = CURRENT_NAME,
     srcs = glob([SRC + '/*.java']),
     deps = COMPILE_DEPS,
diff --git a/providers/bgp/topology/BUCK b/providers/bgp/topology/BUCK
index 6ea4e5b..59e56f6 100644
--- a/providers/bgp/topology/BUCK
+++ b/providers/bgp/topology/BUCK
@@ -14,7 +14,7 @@
     '//lib:TEST',
 ]
 
-java_library(
+osgi_jar(
     name = CURRENT_NAME,
     srcs = glob([SRC + '/*.java']),
     deps = COMPILE_DEPS,