Enhance mps/mpo reproducibility; Print git hash for easier debugging;…

[jiangtong1000]

• Enhance mps/mpo reproducibility; Currently, even with preset random seed, the MPO or the subsequent ground state MPS will be different for two runs. The MPO is different because the Op order can be different before doing Hopcroft-Corp; The MPS can be different because the sign carried by the eigenvectors. This does not influence the final energy, but keeping everything reproducible could be important at sometime, especially for debugging purpose
• The git hash information is printed every time running the package, for easier debugging
• Fix mp dump/load

[liwt31]

I really like this commit but there are some technical problems. Please see the comments

[codecov[bot]]

Codecov Report

Patch coverage: 87.50% and no project coverage change.

Comparison is base (1576c3c) 84.79% compared to head (bf6af3c) 84.80%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #162 +/- ## ======================================= Coverage 84.79% 84.80% ======================================= Files 105 105 Lines 10184 10207 +23 ======================================= + Hits 8636 8656 +20 - Misses 1548 1551 +3 ``` | [Files Changed](https://app.codecov.io/gh/shuaigroup/Renormalizer/pull/162?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=shuaigroup) | Coverage Δ | | |---|---|---| | [renormalizer/mps/mpo.py](https://app.codecov.io/gh/shuaigroup/Renormalizer/pull/162?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=shuaigroup#diff-cmVub3JtYWxpemVyL21wcy9tcG8ucHk=) | `91.12% <ø> (-0.04%)` | :arrow_down: | | [renormalizer/mps/mp.py](https://app.codecov.io/gh/shuaigroup/Renormalizer/pull/162?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=shuaigroup#diff-cmVub3JtYWxpemVyL21wcy9tcC5weQ==) | `84.80% <66.66%> (+0.04%)` | :arrow_up: | | [renormalizer/mps/backend.py](https://app.codecov.io/gh/shuaigroup/Renormalizer/pull/162?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=shuaigroup#diff-cmVub3JtYWxpemVyL21wcy9iYWNrZW5kLnB5) | `70.83% <82.35%> (+1.02%)` | :arrow_up: | | [renormalizer/mps/gs.py](https://app.codecov.io/gh/shuaigroup/Renormalizer/pull/162?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=shuaigroup#diff-cmVub3JtYWxpemVyL21wcy9ncy5weQ==) | `96.04% <100.00%> (+0.11%)` | :arrow_up: | | [renormalizer/mps/symbolic\_mpo.py](https://app.codecov.io/gh/shuaigroup/Renormalizer/pull/162?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=shuaigroup#diff-cmVub3JtYWxpemVyL21wcy9zeW1ib2xpY19tcG8ucHk=) | `75.76% <100.00%> (+0.06%)` | :arrow_up: |

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