XMPP as SBI support: implementation of core XMPP and Xmpp Device Provider

State machine handled by XmppSession interface, most of tests implemented

XmppDeviceFactory re-designed, tests updated

pom and BUCK files updated

Change-Id: I4c6955e091169c945415084cbb000c61b474c0fc
diff --git a/providers/xmpp/device/BUCK b/providers/xmpp/device/BUCK
new file mode 100644
index 0000000..265d928
--- /dev/null
+++ b/providers/xmpp/device/BUCK
@@ -0,0 +1,26 @@
+COMPILE_DEPS = [
+    '//lib:CORE_DEPS',
+    '//lib:tinder-xmpp',
+    '//protocols/xmpp/core/api:onos-protocols-xmpp-core-api',
+    '//protocols/xmpp/core/ctl:onos-protocols-xmpp-core-ctl',
+]
+
+TEST_DEPS = [
+    '//lib:TEST_ADAPTERS',
+]
+
+osgi_jar_with_tests (
+    deps = COMPILE_DEPS,
+    test_deps = TEST_DEPS,
+)
+
+onos_app (
+    app_name = 'org.onosproject.xmpp.device',
+    title = 'XMPP Device Provider',
+    category = 'Provider',
+    url = 'https://wiki.onosproject.org/display/ONOS/XMPP+as+SBI',
+    description = 'XMPP protocol southbound provider.',
+    required_apps = [
+        'org.onosproject.protocols.xmpp',
+    ]
+)
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