Remove spurious dependencies to org.json and git-commit-id-maven plugin.

[wetneb]

Fixes #142.

New dependencies:

[INFO] org.odftoolkit:odfdom-java:jar:0.11.0-SNAPSHOT
[INFO] +- xerces:xercesImpl:jar:2.12.1:compile
[INFO] +- xalan:serializer:jar:2.7.2:compile
[INFO] +- junit:junit:jar:4.13.2:test
[INFO] |  \- org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] +- org.apache.jena:jena-core:jar:4.3.0:compile
[INFO] |  +- org.apache.jena:jena-base:jar:4.3.0:compile
[INFO] |  |  +- org.apache.jena:jena-shaded-guava:jar:4.3.0:compile
[INFO] |  |  +- org.apache.commons:commons-csv:jar:1.9.0:compile
[INFO] |  |  +- commons-io:commons-io:jar:2.11.0:compile
[INFO] |  |  +- commons-codec:commons-codec:jar:1.15:compile
[INFO] |  |  \- com.github.andrewoma.dexx:collection:jar:0.7:compile
[INFO] |  +- org.apache.jena:jena-iri:jar:4.3.0:compile
[INFO] |  \- commons-cli:commons-cli:jar:1.5.0:compile
[INFO] +- org.apache.jena:jena-core:jar:tests:4.3.0:test
[INFO] +- net.rootdev:java-rdfa:jar:1.0.0-BETA1:compile
[INFO] +- commons-validator:commons-validator:jar:1.7:compile
[INFO] |  +- commons-beanutils:commons-beanutils:jar:1.9.4:compile
[INFO] |  +- commons-digester:commons-digester:jar:2.1:compile
[INFO] |  +- commons-logging:commons-logging:jar:1.2:compile
[INFO] |  \- commons-collections:commons-collections:jar:3.2.2:compile
[INFO] +- org.apache.commons:commons-lang3:jar:3.12.0:compile
[INFO] +- org.slf4j:slf4j-api:jar:1.7.32:compile
[INFO] +- org.slf4j:slf4j-simple:jar:1.7.32:compile
[INFO] \- org.apache.commons:commons-compress:jar:1.21:compile

[wetneb]

Aargh, this library actually depends on org.json, that dependency was not spurious. This has a license that is not OSI-compliant. I'll open a separate issue about this.

[wetneb]

Issue about the dependency to org.json: #144

[svanteschubert]

We might change/add
io.github.git-commit-id
to a test dependency.

The reason for this dependency:
During building the current GIT commit hash is being extracted and placed into the manifest to be read out whenever a "java -jar odfdom.jar is being called to be certain when similar behaviour can be expected from ODFDOM JARs.
But yes, this GIT extraction functionality is not required during run-time. Indeed a bug!

[wetneb]

Well, if the tests pass without this dependency, I do not think we need to add this artifact as a test dependency. Maven can use it as part of the build process already, since it is declared as a plugin.

[svanteschubert]

Good catch, Antonin! And many thanks for your quick patch!
Cheers,
Svante