Resolve any lint violations in Redfish importer

Resolve any errors reported by "make lint"

root@ip-10-5-1-11:~/cord/device-management# make lint

Running style check...

Style check OK

Running Dockerfile lint check ...

Dockerfile lint check OK

Running sanity check...

Sanity check OK

Running dependency check...

all modules verified

Dependency check OK

root@ip-10-5-1-11:~/cord/device-management#

to fix this did following things

1. to fix lint-dockerfile excluded vendor directory
2. to fix lint-style had execute go fmt on most files
3. to fix lint-sanity fixed following errors and generated pb.go file and recompiled demotest

root@ip-10-5-1-11:~/cord/device-management# make lint-sanity

Running sanity check...

1. github.com/opencord/device-management

./main.go:77:2: Println arg list ends with redundant newline

./main.go:96:2: Println arg list ends with redundant newline

./main.go:109:2: Println arg list ends with redundant newline

./main.go:136:2: Println arg list ends with redundant newline

./main.go:171:2: Println arg list ends with redundant newline

./main.go:269:14: Printf call has arguments but no formatting directives

./main.go:365:2: Println arg list ends with redundant newline

./main.go:391:3: Println call has possible formatting directive %v

./main.go:397:3: Println call has possible formatting directive %v

1. github.com/opencord/device-management/demo_test

demo_test/test.go:54:2: Println arg list ends with redundant newline

demo_test/test.go:76:3: Error call has possible formatting directive %s

demo_test/test.go:86:5: Error call has possible formatting directive %s

demo_test/test.go:88:5: Info call has possible formatting directive %s

demo_test/test.go:132:3: Fatal call has possible formatting directive %v

demo_test/test.go:139:3: Fatal call has possible formatting directive %v

demo_test/test.go:144:3: Fatal call has possible formatting directive %v

Makefile:102: recipe for target 'lint-sanity' failed

make: *** [lint-sanity] Error 2

root@ip-10-5-1-11:~/cord/device-management#