Add feature for general TB object retrieve

[seokho-son]

기존 텀블벅은
텀블벅에 등록된 오브젝트(특히 문제가 있는 오브젝트)를 개발자가 확인하는 데 어려움이 있었음.

본 PR은 텀블벅의 오브젝트 리스트를 조회하고,
값을 조회할 수 있는 기능 제공. (관리자 및 개발자를 위한 기능)

1. objectList
2. objectValue

예를 들어,

1. http://localhost:1323/tumblebug/objectList?key=/ns/ns-01/ 는
   /ns/ns-01/ 가 포함된 모든 TB 오브젝트의 ID 리스트를 반환함.

2. http://localhost:1323/tumblebug/objectValue?key=/ns/ns-01/mcis/aws-ap-southeast-1-shson/vmgroup/aws-ap-southeast-1-shson 는
   /ns/ns-01/mcis/aws-ap-southeast-1-shson/vmgroup/aws-ap-southeast-1-shson 오브젝트의 값을 반환함.

테스트 스크립트:

1. list-object.sh

son@son:~/go/src/github.com/cloud-barista/cb-tumblebug/test/official/sequentialFullTest$ ./list-object.sh /ns/ns-01/mcis/
####################################################################
## 0. Object: List
####################################################################
{
   "object" : [
      "/ns/ns-01/mcis/aws-ap-southeast-1-shson",
      "/ns/ns-01/mcis/aws-ap-southeast-1-shson/vm/aws-ap-southeast-1-shson-0",
      "/ns/ns-01/mcis/aws-ap-southeast-1-shson/vm/aws-ap-southeast-1-shson-1",
      "/ns/ns-01/mcis/aws-ap-southeast-1-shson/vm/aws-ap-southeast-1-shson-2",
      "/ns/ns-01/mcis/aws-ap-southeast-1-shson/vmgroup/aws-ap-southeast-1-shson"
   ]
}

son@son:~/go/src/github.com/cloud-barista/cb-tumblebug/test/official/sequentialFullTest$ ./list-object.sh /ns/ns-01/mcis/
####################################################################
## 0. Object: List
####################################################################
{
   "object" : null
}

2. get-object.sh

son@son:~/go/src/github.com/cloud-barista/cb-tumblebug/test/official/sequentialFullTest$ ./get-object.sh /ns/ns-01/mcis/aws-ap-southeast-1-shson/vmgroup/aws-ap-southeast-1-shson
####################################################################
## 0. Object: Get value
####################################################################
{
   "id" : "aws-ap-southeast-1-shson",
   "name" : "aws-ap-southeast-1-shson",
   "vmId" : [
      "aws-ap-southeast-1-shson-0",
      "aws-ap-southeast-1-shson-1",
      "aws-ap-southeast-1-shson-2"
   ],
   "vmGroupSize" : "3"
}

son@son:~/go/src/github.com/cloud-barista/cb-tumblebug/test/official/sequentialFullTest$ ./get-object.sh /ns/ns-01/mcis/aws-ap-southeast-1-shson/vmgroup/aws-ap-southeast-1-shson
####################################################################
## 0. Object: Get value
####################################################################
{
   "message" : "Failed to find /ns/ns-01/mcis/aws-ap-southeast-1-shson/vmgroup/aws-ap-southeast-1-shsonobject"
}

[seokho-son]

/assign @jihoon-seo

[seokho-son]

@jihoon-seo I think this feature will be helpful for developers ~ :)

[jihoon-seo]

Looks good to me!!