Create command with -c flag has versions inconsistencies

[debovema]

When creating project with the -c flag to set a version for github.com/project-flogo/core, the resulting go.mod does not have the expected versions.

For instance flogo create -f v0.9.0-alpha.3 app will create following go.mod file:

module main                                                                        
require (
                        github.com/project-flogo/contrib v0.9.0-alpha.4 // indirect
                        github.com/project-flogo/core v0.9.0-alpha.5
                        github.com/project-flogo/flow v0.9.0-alpha.4
                        github.com/stretchr/objx v0.1.1 // indirect
                        github.com/stretchr/testify v1.3.0 // indirect
)

Even though we specified v0.9.0-alpha.3 explicitly, the github.com/project-flogo/contrib@v0.9.0-alpha.4 and github.com/project-flogo/flow@v0.9.0-alpha.4 depend on github.com/project-flogo/core@v0.9.0-alpha.4, so v0.9.0-alpha.4 should be used instead of v0.9.0-alpha.5.