Remove all ros::object slots in def-set-get-param-method

[Affonso-Gui]

Removing all ros::object slots instead of plist and _connection-header in def-set-get-param-method, so that even if definition of ros::object changes in the future this code remains functional.
jsk-ros-pkg/jsk_roseus#606

Also changing to use symbol-name instead of format. Strings get to uppercase, but since they are read-stringed afterwards should make no difference.

>>Need testing<<

Btw some random notes:

• I'm pretty sure that string-left-trim is not the right function here, specially if rtc_name may contain underscores.
  

  rtmros_common/hrpsys_ros_bridge/euslisp/rtm-ros-robot-interface.l

  Lines 236 to 258 in 0ac8868

  	(:get-ROSBridge-method-def-macro
  	(rtc-name srv-name &optional (ros-pkg-name "hrpsys_ros_bridge"))
  	(let* ((meth-name (string-left-trim "_" (string-left-trim rtc-name (string-left-trim "_" (string-left-trim "OpenHRP" srv-name)))))
  	(srv-request (read-from-string (format nil "~A::~ARequest" ros-pkg-name srv-name)))
  	(init-method (find-if #'(lambda (x) (eq (car x) :init)) (send (eval srv-request) :methods)))
  	;;(new-method-name (read-from-string (format nil ":~A" (string-left-trim "_" (string-left-trim rtc-name (string-left-trim "_" (string-left-trim "OpenHRP" srv-name))))))))
  	(new-method-name (read-from-string (format nil ":~A" (string-left-trim "_" (string-left-trim "OpenHRP" srv-name))))))
  	(if (find-method self new-method-name)
  	(progn
  	(warn ";; Method conflict in ROSBridge defmethod!! ;; ~A~%" srv-name)
  	nil)
  	`(defmethod rtm-ros-robot-interface
  	(,new-method-name
  	,(append (cadr init-method) (list (list 'rosbridge-name (format nil "~AROSBridge" rtc-name))))
  	(or
  	(ros::service-call
  	(format nil "/~A/~A" rosbridge-name ,meth-name)
  	(instance ,(eval srv-request) :init ,@(mapcan #'(lambda (x) (list (caar x) (cadar x))) (cdadr init-method))))
  	(error ";; service call failed (~A)" ,new-method-name)
  	)
  	)
  	)
  	)))

  
  function "string-trim" behaves suspiciously euslisp/EusLisp#249
  string trim is sometimes incorrect euslisp/EusLisp#336

• (elt ":" 0) => #\:

[Affonso-Gui]

@Naoki-Hiraoka @itohdak @mmurooka Can I ask help for testing with HRP2 simulation?

[Naoki-Hiraoka]

:set-st-param
がシミュレーションで問題なく動くことを確認しました

[pazeshun]

Waiting for #1080#1085

[pazeshun]

#1085 is merged to master and master is merged to this PR.
No more WIP.

[pazeshun]

@k-okada
This PR prevents such cases as #1053
And this PR seems functional on real robot (thanks to #1075, #1079) and travis test (thanks to #1085).
Could you review this?