Changing the DPB fixure to get breakout cfg table (sonic-net#17)

Signed-off-by: Sangita Maity <sangitamaity0211@gmail.com>

tests/conftest.py

@@ -836,3 +836,30 @@ def testlog(request, dvs):
     dvs.runcmd("logger === start test %s ===" % request.node.name)
     yield testlog
     dvs.runcmd("logger === finish test %s ===" % request.node.name)
+
+##################### DPB fixtures ###########################################
+
+HWSKU="Force10-S6000"
+
+@pytest.yield_fixture(scope="module")
+def create_dpb_config_file(dvs):
+    cmd = "sonic-cfggen -p /usr/share/sonic/hwsku/platform.json -k {} --print-data > /tmp/ports.json".format(HWSKU)
+    dvs.runcmd(['sh', '-c', cmd])
+    cmd = "sonic-cfggen -j /etc/sonic/init_cfg.json -j /tmp/ports.json --print-data > /tmp/dpb_config_db.json"
+    dvs.runcmd(['sh', '-c', cmd])
+    cmd = "mv /etc/sonic/config_db.json /etc/sonic/config_db.json.bak"
+    dvs.runcmd(cmd)
+    cmd = "cp /tmp/dpb_config_db.json /etc/sonic/config_db.json"
+    dvs.runcmd(cmd)
+
+@pytest.yield_fixture(scope="module")
+def remove_dpb_config_file(dvs):
+    cmd = "mv /etc/sonic/config_db.json.bak /etc/sonic/config_db.json"
+    dvs.runcmd(cmd)
+
+@pytest.yield_fixture(scope="module")
+def dpb_setup_fixture(dvs):
+    create_dpb_config_file(dvs)
+    dvs.restart()
+    yield
+    remove_dpb_config_file(dvs)