deps: update dependency com.google.cloud:google-cloud-dataproc-bom to…

… v0.122.0 (#516)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-dataproc-bom](https://togithub.com/googleapis/java-dataproc) | minor | `0.121.0` -> `0.122.0` |

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### Release Notes

<details>
<summary>googleapis/java-dataproc</summary>

### [`v0.122.0`](https://togithub.com/googleapis/java-dataproc/blob/master/CHANGELOG.md#&#8203;01220-httpswwwgithubcomgoogleapisjava-dataproccomparev01210v01220-2020-04-09)

[Compare Source](https://togithub.com/googleapis/java-dataproc/compare/v0.121.0...v0.122.0)

##### Features

-   **v1:** add Jobs.SubmitJobAsOperation, SparkR and Presto job types to WorkflowTemplates ([#&#8203;137](https://www.github.com/googleapis/java-dataproc/issues/137)) ([ac18c87](https://www.github.com/googleapis/java-dataproc/commit/ac18c872f270d1a3248797ceceaf0923375bfc2f))

##### Dependencies

-   update core dependencies ([#&#8203;91](https://www.github.com/googleapis/java-dataproc/issues/91)) ([2e8fce0](https://www.github.com/googleapis/java-dataproc/commit/2e8fce05b413f52efa7dc9b0c3d40e19d0d687ab))
-   update dependency com.google.cloud:google-cloud-core to v1.93.4 ([#&#8203;127](https://www.github.com/googleapis/java-dataproc/issues/127)) ([9dd5f1a](https://www.github.com/googleapis/java-dataproc/commit/9dd5f1a28cf735a611a570026e4762137ac4b9e0))
-   update dependency org.threeten:threetenbp to v1.4.3 ([#&#8203;111](https://www.github.com/googleapis/java-dataproc/issues/111)) ([3d7178b](https://www.github.com/googleapis/java-dataproc/commit/3d7178b323615d8ddde92b03349da2ec81aee809))

</details>

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pom.xml

@@ -312,7 +312,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-dataproc-bom</artifactId>
-        <version>0.121.0</version>
+        <version>0.122.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>