Adding support for the Query operation

This change adds support for the Query operation, including updates to
the KMIP client and core object libraries, the KMIP client and core unit
test suites, and a Query unit demo.

kmip/core/utils.py

@@ -66,7 +66,7 @@ def build_er_error(class_object, descriptor, expected, received,
 class BytearrayStream(io.RawIOBase):
     def __init__(self, data=None):
         if data is None:
-            self.buffer = b''
+            self.buffer = bytes()
         else:
             self.buffer = bytes(data)
 
@@ -81,10 +81,11 @@ class BytearrayStream(io.RawIOBase):
         return data
 
     def readall(self):
-        data = self.buffer[0:]
-        self.buffer = self.buffer[len(self.buffer):]
+        data = self.buffer
+        self.buffer = bytes()
         return data
 
+    # TODO (peter-hamilton) Unused, add documentation or cut.
     def readinto(self, b):
         if len(b) <= len(self.buffer):
             num_bytes_to_read = len(b)
@@ -117,6 +118,17 @@ class BytearrayStream(io.RawIOBase):
 
     def __eq__(self, other):
         if isinstance(other, BytearrayStream):
-            return (self.buffer == other.buffer)
+            if len(self.buffer) != len(other.buffer):
+                return False
+            elif self.buffer != other.buffer:
+                return False
+            else:
+                return True
+        else:
+            return NotImplemented
+
+    def __ne__(self, other):
+        if isinstance(other, BytearrayStream):
+            return not (self == other)
         else:
             return NotImplemented