[Snyk] Security upgrade io.streamnative:pulsar-broker from 3.0.0.1 to v2.8.0-rc-202106091140

[BewareMyPower]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `maven` dependencies of this project.

#### Changes included in this PR - Changes to the following files to upgrade the vulnerable dependencies to a fixed version: - pom.xml #### Vulnerabilities that will be fixed ##### With an upgrade: Severity | Priority Score (*) | Issue | Upgrade | Breaking Change | Exploit Maturity :-------------------------:|-------------------------|:-------------------------|:-------------------------|:-------------------------|:-------------------------  | **379/1000**
**Why?** Has a fix available, CVSS 3.3 | Creation of Temporary File in Directory with Insecure Permissions
[SNYK-JAVA-COMGOOGLEGUAVA-5710356](https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEGUAVA-5710356) | `io.streamnative:pulsar-broker:`
`3.0.0.1 -> v2.8.0-rc-202106091140`
| Yes | No Known Exploit  | **539/1000**
**Why?** Has a fix available, CVSS 6.5 | Denial of Service (DoS)
[SNYK-JAVA-IONETTY-5725787](https://snyk.io/vuln/SNYK-JAVA-IONETTY-5725787) | `io.streamnative:pulsar-broker:`
`3.0.0.1 -> v2.8.0-rc-202106091140`
| Yes | No Known Exploit (*) Note that the real score may have changed since the PR was raised. Check the changes in this PR to ensure they won't cause issues with your project. ------------ **Note:** *You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs.* For more information: 🧐 [View latest project report](https://app.snyk.io/org/bewaremypower/project/745a6ec8-e389-42d3-b151-42e0855cc54d?utm_source=github&utm_medium=referral&page=fix-pr) 🛠 [Adjust project settings](https://app.snyk.io/org/bewaremypower/project/745a6ec8-e389-42d3-b151-42e0855cc54d?utm_source=github&utm_medium=referral&page=fix-pr/settings) 📚 [Read more about Snyk's upgrade and patch logic](https://support.snyk.io/hc/en-us/articles/360003891078-Snyk-patches-to-fix-vulnerabilities) [//]: # (snyk:metadata:{"prId":"610185e6-dfd2-4ef9-8e4b-29224e2301ac","prPublicId":"610185e6-dfd2-4ef9-8e4b-29224e2301ac","dependencies":[{"name":"io.streamnative:pulsar-broker","from":"3.0.0.1","to":"v2.8.0-rc-202106091140"}],"packageManager":"maven","projectPublicId":"745a6ec8-e389-42d3-b151-42e0855cc54d","projectUrl":"https://app.snyk.io/org/bewaremypower/project/745a6ec8-e389-42d3-b151-42e0855cc54d?utm_source=github&utm_medium=referral&page=fix-pr","type":"auto","patch":[],"vulns":["SNYK-JAVA-COMGOOGLEGUAVA-5710356","SNYK-JAVA-IONETTY-5725787"],"upgrade":["SNYK-JAVA-COMGOOGLEGUAVA-5710356","SNYK-JAVA-IONETTY-5725787"],"isBreakingChange":true,"env":"prod","prType":"fix","templateVariants":["updated-fix-title","priorityScore"],"priorityScoreList":[379,539],"remediationStrategy":"vuln"}) --- **Learn how to fix vulnerabilities with free interactive lessons:** 🦉 [Creation of Temporary File in Directory with Insecure Permissions](https://learn.snyk.io/lesson/insecure-temporary-file/?loc=fix-pr) 🦉 [Denial of Service (DoS)](https://learn.snyk.io/lesson/redos/?loc=fix-pr)

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[github-actions[bot]]

@BewareMyPower:Thanks for your contribution. For this PR, do we need to update docs? (The PR template contains info about doc, which helps others know more about the changes. Can you provide doc-related info in this and future PR descriptions? Thanks)