[Fix][Enhancement] Improved Convert-JVTitle and fixed issues related to multi-part files.

[seeyabye]

The latest version (v2.0.2) of Javinizer's -Update allows re-downloading of trailers and re-creation of NFO files, but there's a bug if match.regex is not used.

For instance, if I have the following set of files:

├── bbi-094a.wmv
└── bbi-094b.wmv

The initial multi-part files are bbi-094a.wmv and bbi-094b.wmv respectively.

Using only dmmja as the sole aggregator and running Javinizer for renaming and moving files, I would then obtain

├── bbi00094-pt1.wmv
├── bbi00094-pt1.nfo
├── bbi00094-pt2.wmv
└── bbi00094-pt2.nfo

If we now run Javinizer -Update to force an update, you will see that Javinizer is unable to match any search results.

[2020-09-22T16:59:19][DEBUG] [BBI00094-PT-1] [Get-DmmUrl] Performing [GET] on URL [https://www.dmm.co.jp/search/?redirect=1&enc=UTF-8&category=&searchstr=BBI0009400000T]
[2020-09-22T16:59:19][DEBUG] [BBI00094-PT-2] [Get-DmmUrl] Performing [GET] on URL [https://www.dmm.co.jp/search/?redirect=1&enc=UTF-8&category=&searchstr=BBI0009400000T]
[2020-09-22T16:59:19][DEBUG] [BBI00094-PT-1] [Get-DmmUrl] Searching [3] of [5] results for [BBI00094-PT-1]
[2020-09-22T16:59:19][DEBUG] [BBI00094-PT-2] [Get-DmmUrl] Searching [3] of [5] results for [BBI00094-PT-2]
[2020-09-22T16:59:19][DEBUG] [BBI00094-PT-1] [Get-DmmUrl] Performing [GET] on URL [https://www.dmm.co.jp/digital/videoa/-/detail/=/cid=pred00251/]
[2020-09-22T16:59:19][DEBUG] [BBI00094-PT-2] [Get-DmmUrl] Performing [GET] on URL [https://www.dmm.co.jp/digital/videoa/-/detail/=/cid=pred00251/]
[2020-09-22T16:59:19][DEBUG] [BBI00094-PT-1] [Get-DmmUrl] Result [1] is [pred00251]
[2020-09-22T16:59:19][DEBUG] [BBI00094-PT-1] [Get-DmmUrl] Performing [GET] on URL [https://www.dmm.co.jp/digital/videoa/-/detail/=/cid=h_1340buzx00001/]
[2020-09-22T16:59:19][DEBUG] [BBI00094-PT-2] [Get-DmmUrl] Result [1] is [pred00251]
[2020-09-22T16:59:19][DEBUG] [BBI00094-PT-2] [Get-DmmUrl] Performing [GET] on URL [https://www.dmm.co.jp/digital/videoa/-/detail/=/cid=h_1340buzx00001/]
[2020-09-22T16:59:20][DEBUG] [BBI00094-PT-1] [Get-DmmUrl] Result [2] is [h_1340buzx00001]
[2020-09-22T16:59:20][DEBUG] [BBI00094-PT-1] [Get-DmmUrl] Performing [GET] on URL [https://www.dmm.co.jp/digital/videoa/-/detail/=/cid=ssni00877/]
[2020-09-22T16:59:20][DEBUG] [BBI00094-PT-2] [Get-DmmUrl] Result [2] is [h_1340buzx00001]
[2020-09-22T16:59:20][DEBUG] [BBI00094-PT-2] [Get-DmmUrl] Performing [GET] on URL [https://www.dmm.co.jp/digital/videoa/-/detail/=/cid=ssni00877/]
[2020-09-22T16:59:20][DEBUG] [BBI00094-PT-1] [Get-DmmUrl] Result [3] is [ssni00877]
[2020-09-22T16:59:20][WARN ] [BBI00094-PT-1] [Get-DmmUrl] not matched on DMM
[2020-09-22T16:59:20][DEBUG] [BBI00094-PT-1] [Get-JVData] [Search - Dmm] [Url - ]
[2020-09-22T16:59:20][DEBUG] [BBI00094-PT-1] [Get-JVData] [Success - Scraper jobs] []
[2020-09-22T16:59:20][DEBUG] [BBI00094-PT-1] [Get-JVData] [Removed - Scraper jobs]
[2020-09-22T16:59:20][WARN ] [bbi00094-pt1.wmv] Skipped -- not matched
[2020-09-22T16:59:21][DEBUG] [BBI00094-PT-2] [Get-DmmUrl] Result [3] is [ssni00877]
[2020-09-22T16:59:21][WARN ] [BBI00094-PT-2] [Get-DmmUrl] not matched on DMM
[2020-09-22T16:59:21][DEBUG] [BBI00094-PT-2] [Get-JVData] [Search - Dmm] [Url - ]
[2020-09-22T16:59:21][DEBUG] [BBI00094-PT-2] [Get-JVData] [Success - Scraper jobs] []
[2020-09-22T16:59:21][DEBUG] [BBI00094-PT-2] [Get-JVData] [Removed - Scraper jobs]
[2020-09-22T16:59:21][WARN ] [bbi00094-pt2.wmv] Skipped -- not matched

As it appears, the filenames were not converted by Convert-JVTitle properly. This PR hopes to solve that problem.

In addition to the updates, I've included the following changes:

• Streamlined the conversion process of Alphabetical parts to part numbers without using too many if..elseif..else statements
• Streamlined ID matching to a single regex.
• Included Unit Test for validating different use cases.

Note: There are a couple of edge-cases that I've not tested. It may be necessary to include them for unit testing.

[jvlflame]

Everything else looks good!

Thanks for adding additional test cases for the other use-cases, that was helpful when I was going through it to check. I also updated the build/test function to not error out based on code coverage % so builds shouldn't fail with the tests.

We can merge now.