Bump influxdb-java from 2.14 to 2.15 in /modules/influxdb (#1271)

Bumps [influxdb-java](https://github.com/influxdata/influxdb-java) from 2.14 to 2.15.
- [Release notes](https://github.com/influxdata/influxdb-java/releases)
- [Changelog](https://github.com/influxdata/influxdb-java/blob/master/CHANGELOG.md)
- [Commits](influxdata/influxdb-java@influxdb-java-2.14...influxdb-java-2.15)

Signed-off-by: dependabot[bot] <support@dependabot.com>

modules/influxdb/build.gradle

@@ -3,6 +3,6 @@ description = "Testcontainers :: InfluxDB"
 dependencies {
     compile project(':testcontainers')
 
-    compileOnly 'org.influxdb:influxdb-java:2.14'
-    testCompile 'org.influxdb:influxdb-java:2.10'
+    compileOnly 'org.influxdb:influxdb-java:2.15'
+    testCompile 'org.influxdb:influxdb-java:2.15'
 }