explicit use of std::vector instead of buffer/Buffer

There were several scoped 'using buffer = std::vector<uint8_t>;' in
header files. This consolidates the code base to use
std::vector<uint8_t> instead of buffer or Buffer. This makes the code
easier to read and debug.

Change-Id: I918a0f6ca9b8e4b9d331175dccff45cbf4c8379d
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
diff --git a/sol/sol_manager.hpp b/sol/sol_manager.hpp
index a107994..4a615af 100644
--- a/sol/sol_manager.hpp
+++ b/sol/sol_manager.hpp
@@ -247,7 +247,7 @@
          *
          *  @return 0 on success and errno on failure.
          */
-        int writeConsoleSocket(const Buffer& input) const;
+        int writeConsoleSocket(const std::vector<uint8_t>& input) const;
 
     private:
         SOLPayloadMap payloadMap;