exceptions: Make Tlv::Error a base class for all packet-processing exceptions

This commit also includes a number of code style fixes.

Change-Id: I44f83915e733b43d5f43b4266902c8262e928d91
Refs: #1528
diff --git a/src/security/sec-public-info.hpp b/src/security/sec-public-info.hpp
index 99b4f57..ee32d05 100644
--- a/src/security/sec-public-info.hpp
+++ b/src/security/sec-public-info.hpp
@@ -23,7 +23,8 @@
  * It specify interfaces related to public information, such as identity, public keys and
  * certificates.
  */
-class SecPublicInfo {
+class SecPublicInfo
+{
 public:
   class Error : public std::runtime_error
   {