add HTML report to Makefile and funtional only test

[medyagh]

After this PR

• All the Makefile integration tests will output their test logs to ./out/testout_COMMITSHA.txt
• There is new make target called "integration-functional-only" that only runs functional tests
• make html_report will convert the last test logs in ./out/testout_COMMITSHA.txt to HTML in ./out/testout_COMMITSHA.html on MacOs it will use open command to also automatically open the report in browser.

make html_report

github.com/kubernetes/minikube/  -details "3e5d0abba"
{
    "NumberOfTests": 1,
    "NumberOfFail": 0,
    "NumberOfPass": 1,
    "NumberOfSkip": 0,
    "FailedTests": null,
    "PassedTests": [
        "TestFunctional/serial/StartWithProxy"
    ],
    "GopoghVersion": "v0.1.21",
    "GopoghBuild": "a81078f701f45acf523f7e1162606405e1767e99",
    "Detail": {
        "Name": "makefile_functional",
        "Details": "3e5d0abba",
        "PR": "",
        "RepoName": "github.com/kubernetes/minikube/"
    }
}
-------------------------- Open HTML Report in Browser: ---------------------------
open /Users/medya/workspace/minikube/out/testout_3e5d0abba.html
-----------------------------------------------------------------------------------
open /Users/medya/workspace/minikube/out/testout_3e5d0abba.html || true

closes #9212

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