Added exception handling 

Added more exceptions 

Split parameter loop into separate gets. It's less efficient but we know exactly when to get a parameter

Split parameter loop into separate gets. It's less efficient but we know exactly when to get a parameter

2. Make it clear that the parameters named "sshkey" and "guiscript" both refer to the actual file content.
3. Have not had the chance to test it.

Implemented tosca servcie 
Plan is now GET 
Implemented provison controller 

Make sure we write input files correctly 

Casted objects to strings

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