MXS-1538: Integrate CDC-Connector into MaxScale

Added the files from the repository to MaxScale. Created a new CMake
function for installing development libraries.

connectors/cdc-connector/examples/main.cpp

@@ -0,0 +1,51 @@
+/**
+ * This is an example on how to use the CDC Connector to print the keys and
+ * their values.
+ */
+
+#include "../cdc_connector.h"
+#include <iostream>
+
+int main(int argc, char** argv)
+{
+
+    if (argc < 6)
+    {
+        std::cout << "Usage: HOST PORT USER PASSWORD DATABASE.TABLE" << std::endl;
+        std::cout << std::endl;
+        std::cout << "Note that DATABASE.TABLE must have both database and table " << std::endl;
+        std::cout << "combined together as one value with a period." << std::endl;
+        std::cout << std::endl;
+        return 1;
+    }
+
+    CDC::Connection conn(argv[1],       // Host
+                         atoi(argv[2]), // Port
+                         argv[3],       // User
+                         argv[4]);      // Password
+
+    if (conn.connect(argv[5]))
+    {
+        CDC::Row row;
+
+        while ((row = conn.read()))
+        {
+            for (size_t i = 0; i < row->length(); i++)
+            {
+                if (i != 0)
+                {
+                    std::cout << ", ";
+                }
+                std::cout << row->key(i) << ": " << row->value(i);
+            }
+
+            std::cout << std::endl;
+        }
+    }
+    else
+    {
+        std::cout << conn.error() << std::endl;
+    }
+
+    return 0;
+}