Check why Travis has a problem with apache commons dependencies in oracleJDK

[labra]

Since last update to oraclejdk9 in Travis, SHaclEX raises an exception.

It seems there are some problems with library dependencies. It fails with:

[error] sbt.librarymanagement.ResolveException: unresolved dependency: org.apache.commons#commons-text;1.2: Resolution failed several times for dependency: org.apache.commons#commons-text;1.2 {compile=[default(compile)]}:: 
[error] 	Resolution failed several times for dependency: org.apache.commons#commons-parent;42 {}:: 
[error] 	sonatype-snapshots: unable to get resource for org/apache/commons#commons-parent;42: res=https://oss.sonatype.org/content/repositories/snapshots/org/apache/commons/commons-parent/42/commons-parent-42.jar: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target