KNOX-3240: Remove POM duplicates

[hanicz]

KNOX-3240 - Remove POM duplicates

What changes were proposed in this pull request?

Removed duplicates from POM files to fix the below build time warning messages

[WARNING] Some problems were encountered while building the effective model for org.apache.knox:gateway-provider-rewrite-step-encrypt-uri:jar:3.0.0-SNAPSHOT
[WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: org.jboss.shrinkwrap:shrinkwrap-api:jar -> duplicate declaration of version (?) @ line 81, column 21
[WARNING]
[WARNING] Some problems were encountered while building the effective model for org.apache.knox:gateway-service-webhdfs:jar:3.0.0-SNAPSHOT
[WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: org.apache.knox:gateway-util-common:jar -> duplicate declaration of version (?) @ line 71, column 21
[WARNING]
[WARNING] Some problems were encountered while building the effective model for org.apache.knox:gateway-test:jar:3.0.0-SNAPSHOT
[WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: org.apache.hadoop:hadoop-common:jar -> duplicate declaration of version (?) @ line 386, column 21

How was this patch tested?

Built it locally and verified that the warning messages are gone.

[github-actions]

Test Results

7 tests   7 ✅  1s ⏱️
1 suites  0 💤
1 files    0 ❌

Results for commit 158a9bd.