Update some dependencies to current releases

[mprins]

• commons-fileupload:commons-fileupload (1.3.1 -> 1.3.3)
• commons-logging:commons-logging (1.1.3 -> 1.2)
• org.testng:testng (6.8.8 -> 6.14.3)
• javax.mail:mail 1.4.7 -> javax.javax.mail-api 1.6.2
• com.fasterxml.jackson.core:jackson-core (2.0.1 -> 2.9.8)
• com.fasterxml.jackson.core:jackson-databind (2.0.1 -> 2.9.8)
• com.fasterxml.jackson.core:jackson-annotations (2.0.1 -> 2.9.8)
• org.apache.httpcomponents:httpasyncclient (4.0.2 -> 4.1.4)

Not sure about updating the Spring dependency, so omitted. To get a list of available updates you can use the Codehaus versions plugin: mvn -U org.codehaus.mojo:versions-maven-plugin:display-dependency-updates -T1 > dependency-updates.log

NB. I can recommend registering this repository at Dependabot for automated dependency update PRs. see: https://app.dependabot.com/

[mprins]

There seems to be no interest in this maintainance request