Fixed bug when printing information about quantile distance matrices

[nateosher]

The print generic used to print the incorrect number of quantile distance matrix generated. Also, I made it so the MltplxObject print function doesn't print anything about quantile distance matrices unless they've been generated to keep it consistent with MltplxExperiment, but we can always change it back

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.04 :tada:

Comparison is base (61e5787) 95.14% compared to head (6f42943) 95.19%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #81 +/- ## ========================================== + Coverage 95.14% 95.19% +0.04% ========================================== Files 32 32 Lines 886 895 +9 ========================================== + Hits 843 852 +9 Misses 43 43 ``` | [Impacted Files](https://codecov.io/gh/nateosher/DM-ME/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | Coverage Δ | | |---|---|---| | [R/MltplxExperiment.R](https://codecov.io/gh/nateosher/DM-ME/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None#diff-Ui9NbHRwbHhFeHBlcmltZW50LlI=) | `93.44% <100.00%> (+0.33%)` | :arrow_up: | | [R/MltplxObject.R](https://codecov.io/gh/nateosher/DM-ME/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None#diff-Ui9NbHRwbHhPYmplY3QuUg==) | `97.36% <100.00%> (+0.07%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None)

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