Panic when using local modules

[munir131]

https://github.com/project-flogo/cli/blob/master/util/mod.go#L309

In case of that length of mods should be more than 4.

$ flogo build --verbose -e                                                                
panic: runtime error: index out of range [3] with length 2

goroutine 1 [running]:
github.com/project-flogo/cli/util.(*ModDepManager).AddReplacedContribForBuild(0xc0000122d0)
	/home/munir/goWorkspace/pkg/mod/github.com/project-flogo/[email protected]/util/mod.go:309 +0x41d
github.com/project-flogo/cli/api.BuildProject({0x91a8e8, 0xc0000a6410}, {0x40?, 0xdd?, {0x0?, 0xc0000fe200?}})
	/home/munir/goWorkspace/pkg/mod/github.com/project-flogo/[email protected]/api/build.go:23 +0x7d
github.com/project-flogo/cli/commands.glob..func2(0xb96b60?, {0xc000092460?, 0x2?, 0x2?})
	/home/munir/goWorkspace/pkg/mod/github.com/project-flogo/[email protected]/commands/build.go:49 +0x116
github.com/spf13/cobra.(*Command).execute(0xb96b60, {0xc000092440, 0x2, 0x2})
	/home/munir/goWorkspace/pkg/mod/github.com/spf13/[email protected]/command.go:830 +0x663
github.com/spf13/cobra.(*Command).ExecuteC(0xb972e0)
	/home/munir/goWorkspace/pkg/mod/github.com/spf13/[email protected]/command.go:914 +0x2ef
github.com/spf13/cobra.(*Command).Execute(...)
	/home/munir/goWorkspace/pkg/mod/github.com/spf13/[email protected]/command.go:864
github.com/project-flogo/cli/commands.Execute()
	/home/munir/goWorkspace/pkg/mod/github.com/project-flogo/[email protected]/commands/root.go:52 +0x25
main.main()
	/home/munir/goWorkspace/pkg/mod/github.com/project-flogo/[email protected]/cmd/flogo/main.go:26 +0x8b