Fixed some mtr test problems



dbug/tests.c:
  Fixed compiler warnings
mysql-test/r/handlersocket.result:
  Fixed that plugin_license is written
mysql-test/suite/innodb/t/innodb_bug60196.test:
  Force sorted results as it was sometimes different on windows
mysql-test/suite/rpl/t/rpl_heartbeat_basic.test:
  Prolong test as this failed on windows
mysql-test/t/handlersocket.test:
  Fixed that plugin_license is written
plugin/handler_socket/handlersocket/handlersocket.cpp:
  Use maria_declare_plugin
plugin/handler_socket/handlersocket/mysql_incl.hpp:
  Fixed compiler warning
plugin/handler_socket/libhsclient/auto_addrinfo.hpp:
  Fixed compiler warning
sql/handler.h:
  Fixed typo
sql/sql_plugin.cc:
  Fixed bug that caused plugin library name twice in error message
storage/maria/ma_checkpoint.c:
  Fixed compiler warning
storage/maria/ma_loghandler.c:
  Fixed compiler warning
unittest/mysys/base64-t.c:
  Fixed compiler warning
unittest/mysys/bitmap-t.c:
  Fixed compiler warning
unittest/mysys/my_malloc-t.c:
  Fixed compiler warning