- Artifact name and module name is `webapp`.
- Artifact `finalName` is `mrl-webapp`.

- Rename variable with data-collection pom file path.
- Remove `target` folder from cache (see recommendation regarding cache usage here: https://docs.gitlab.com/ee/ci/caching/).
- Rename `jar` job to `package`.
- Add jobs for the webapp.

- Remove commented dependency.
- Extract plugins and libraries version in Maven property.
- Remove `source` and `target` in `maven-compiler-plugin` replaced by `maven.compiler.release` when running JDK 9 or higher.
- Add `versions-maven-plugin` configuration to specify a file (`rules.xml`) to ignore alpha, beta, RC and CR versions from available dependencies and plugins updates analysis.
- Run `versions-maven-plugin` `display-property-updates` goal on `validate` phase.

- Add to DatasetFactory a method to get MKT metrics from the database (workaround due to lack of MKT metrics in `Metric` table.
- Add a new constructor to `Metric` class to support lack of threshold for MKT metrics.
- Add controller, service interface and service implementation to provide dendrogram.

- Add to DatasetFactory a method to get MKT metrics from the database (workaround due to lack of MKT metrics in `Metric` table.
- Add a new constructor to `Metric` class to support lack of threshold for MKT metrics.
- Add controller, service interface and service implementation to provide dendrogram.

Fix for weird problems with closed issues: projects that never close issues, and bug in old gitlab versions with null closing date

Should allow to have only code related to display in XWiki page and all preprocessing done in the web app.

- Use slf4j and logback for logging
- Copy dependencies on `package` Maven phase instead of `install`

To document deployment.

Only include libraries with scope `compile` in the `lib` folder used as jar `Class-Path` define in `MANIFEST.MF`

Various code clean up and potential bug fix

See merge request !5

- Use annotation for servlet over configuration in `web.xml`
- Remove `throws` for servlet methods that do not throws exception
- Remove useless `serialVersionUID`
- Add `final` keyword
- Remove code useless
- Add missing javadoc
- Use `StringBuffer` append instead of concatenation
- Add FIXME comment (in `Metric.java` line 153 and in `TreeNode.java` 36) due to potential bug
- Fix `CREATE DATABASE` SQL statement syntax (`IF NOT EXISTS` need to be locate before database name) in order to match what is documented in official MySQL and MariaDB documentation
- Fix potential bug in `TreeNode` line 82

Gracefully handle db connection issue, logging and various improvements

See merge request !4