Add services tests (network & storage)

[JosephSemrai]

Related Issue

#24

Storage Tests

Added mock functions for:

• uploadToStorage -> upload

Added tests for:

• upload

Network Tests

Added mock functions for:

• create
• delete
• list
• addTags
• removeTags

Added tests for:

• create
• delete // renamed function call to deleteFunction() due to conflict with the 'delete' javascript keyword
• list
• addTags
• removeTags
• createZone (failure case)
• deleteZone (failure case)
• listZone (failure case)