fix(cpescan): bug in NvdVendorProductMatch

[kotakanbe]

What did you implement:

When scanning without specifying the version of the CPE, the detection method should become NvdVendorProductMatch.
But there was a bug that if the Affected version of NVD is specified in the range, it became NvdExactVersionMatch.

• config.toml

[servers.webmin]
    type = "pseudo"
     cpeNames = ["cpe:/a:webmin:webmin"]

• report

./vuls report --format-full-text | grep NvdExact
[Oct 12 06:05:33]  INFO [localhost] vuls-v0.18.0-build-20211012_045947_aac5ef1
[Oct 12 06:05:33]  INFO [localhost] Validating config...
[Oct 12 06:05:33]  INFO [localhost] cveDict.type=sqlite3, cveDict.url=, cveDict.SQLite3Path=/data/vulsctl/docker/cve.sqlite3
[Oct 12 06:05:33]  INFO [localhost] ovalDict.type=sqlite3, ovalDict.url=, ovalDict.SQLite3Path=/home/ubuntu/go/src/github.com/future-architect/vuls/oval.sqlite3
[Oct 12 06:05:33]  INFO [localhost] gost.type=sqlite3, gost.url=, gost.SQLite3Path=/home/ubuntu/go/src/github.com/future-architect/vuls/gost.sqlite3
[Oct 12 06:05:33]  INFO [localhost] exploit.type=sqlite3, exploit.url=, exploit.SQLite3Path=/home/ubuntu/go/src/github.com/future-architect/vuls/go-exploitdb.sqlite3
[Oct 12 06:05:33]  INFO [localhost] metasploit.type=sqlite3, metasploit.url=, metasploit.SQLite3Path=/home/ubuntu/go/src/github.com/future-architect/vuls/go-msfdb.sqlite3
[Oct 12 06:05:33]  INFO [localhost] Loaded: /home/ubuntu/go/src/github.com/future-architect/vuls/results/2021-10-12T05:09:07+09:00
[Oct 12 06:05:33]  INFO [localhost] No need to refresh
| Confidence    | 100 / NvdExactVersionMatch                                                       |
| Confidence     | 100 / NvdExactVersionMatch                                                                          |
| Confidence    | 100 / NvdExactVersionMatch                                                       |
| Confidence     | 100 / NvdExactVersionMatch                                                       |
| Confidence     | 100 / NvdExactVersionMatch                                                                |
| Confidence     | 100 / NvdExactVersionMatch                                                                     |
| Confidence     | 100 / NvdExactVersionMatch                                                                     |
| Confidence     | 100 / NvdExactVersionMatch                                                       |
| Confidence    | 100 / NvdExactVersionMatch                                                       |
| Confidence     | 100 / NvdExactVersionMatch                                                       |
| Confidence     | 100 / NvdExactVersionMatch                                                       |
| Confidence     | 100 / NvdExactVersionMatch                                                       |
| Confidence     | 100 / NvdExactVersionMatch                                                       |
| Confidence     | 100 / NvdExactVersionMatch                                                       |
| Confidence     | 100 / NvdExactVersionMatch                                                       |
| Confidence     | 100 / NvdExactVersionMatch                                                       |
| Confidence    | 100 / NvdExactVersionMatch                                                       |
| Confidence    | 100 / NvdExactVersionMatch                                                       |
| Confidence     | 100 / NvdExactVersionMatch                                                       |
| Confidence     | 100 / NvdExactVersionMatch                                                       |
| Confidence     | 100 / NvdExactVersionMatch                                                       |

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

make test

Checklist:

• Write tests
• Write documentation
• Check that there aren't other open pull requests for the same issue/feature
• Format your source code by make fmt
• Pass the test by make test
• Provide verification config / commands
• Enable "Allow edits from maintainers" for this PR
• Update the messages below

Is this ready for review?: YES