Code for  #4 #3 #2

1. hard code the list instances response
2. Setup Springboot for cloudmock.io
3. return valid response to list instances
Revert "Code for  #4 #3 #2"

This reverts commit be6de9a1c2b8e3e3b20dbbbbc5f2f718b6c19f6a.
Revert "Revert "Code for  #4 #3 #2""

This reverts commit e0cd6547cbf3c917835f672ef4e5510c73f50e0d.
Updates for response type

1. Based on content type received the response content type changes.
2. Added proper annotations for getting request params.
3. Other packaging changes
Mock response

1. Created mock JSON and XML for below commands:
A. describe-instance-status
B. get-console-output
C. get-password
D. terminate-instances
2. Common request params are now maintained as separate file and
validated using javax validation annotations for required true and
false.
3. Utils file created to read JSON and XML response as per requirement.
JSON and XML reponses

1. Created mock JSON and XML for below commands:
A. describe-instance-attribute
B. modify-instance-attribute
C.  reboot-instances
D. reset-instance-attribute
E. start-instances
F. stop-instances
2. Instance IDs for request are parsed properly into an array list.
Merge pull request #5 from armondhonore/echo

Code for  #4 #3 #2