This commit consists of the following:
1) The kafka messaging proxy in Twisted python for adapters
2) Initial implementation and containerization of ponsim OLT adapter
and ponsim ONU adapter
3) Initial submission of request and response facade in both Twisted
python and Go Language
4) Initial implementation of device management and logical device management
in the Core
5) Update to the log module to allow dynamic setting of log level per
package using the gRPC API
6) Bug fixes and minor changes

Change-Id: Ia8f033da84cfd08275335bae9542802415e7bb0f
diff --git a/adapters/common/utils/indexpool.py b/adapters/common/utils/indexpool.py
new file mode 100644
index 0000000..858cb3a
--- /dev/null
+++ b/adapters/common/utils/indexpool.py
@@ -0,0 +1,64 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from bitstring import BitArray
+import structlog
+
+log = structlog.get_logger()
+
+class IndexPool(object):
+    def __init__(self, max_entries, offset):
+        self.max_entries = max_entries
+        self.offset = offset
+        self.indices = BitArray(self.max_entries)
+
+    def get_next(self):
+        try:
+            _pos = self.indices.find('0b0')
+            self.indices.set(1, _pos)
+            return self.offset + _pos[0]
+        except IndexError:
+            log.info("exception-fail-to-allocate-id-all-bits-in-use")
+            return None
+
+    def allocate(self, index):
+        try:
+            _pos = index - self.offset
+            if not (0 <= _pos < self.max_entries):
+                log.info("{}-out-of-range".format(index))
+                return None
+            if self.indices[_pos]:
+                log.info("{}-is-already-allocated".format(index))
+                return None
+            self.indices.set(1, _pos)
+            return index
+
+        except IndexError:
+            return None
+
+    def release(self, index):
+        index -= self.offset
+        _pos = (index,)
+        try:
+            self.indices.set(0, _pos)
+        except IndexError:
+            log.info("bit-position-{}-out-of-range".format(index))
+
+    #index or multiple indices to set all of them to 1 - need to be a tuple
+    def pre_allocate(self, index):
+        if(isinstance(index, tuple)):
+            _lst = list(index)
+            for i in range(len(_lst)):
+                _lst[i] -= self.offset
+            index = tuple(_lst)
+            self.indices.set(1, index)