ISSUE-5922: On the dependencies in the pom.xml files.

[sijie]

Original Issue: apache#5922

---

Describe the bug
Most of pom.xml files, in which some dependencies on the pulsar itself are written as following:
......
<dependency>
<groupId>org.apache.pulsar</groupId> // THIS LINE
<artifactId>pulsar------</artifactId>
<version>${project.version}</version>
</dependency>
......
But most of them are like this:
<dependency>
<groupId>${project.groupId}</groupId> // THIS LINE
<artifactId>pulsar------</artifactId>
<version>${project.version}</version>
</dependency>

Although both of them work, why not use JUST one of them (e.g. <groupId>${project.groupId}</groupId>).

[lihanhui]

Hi Sijie, Let me make them unify.

[sijie]

@lihanhui sounds good. +1

[vcottagiri]

@sijie - can i can work on this?

[sijie]

@vcottagiri yes! You are welcome to make the contribution!