* Fix docker.includes in WhitesourceConfigurationHelper
Not sure, but it seems the [`docker.includes` parameter](https://whitesource.atlassian.net/wiki/spaces/WD/pages/804814917/Unified+Agent+Configuration+File+and+Parameters#UnifiedAgentConfigurationFileandParameters-DockerImages) needs to be a regex.
Our pipeline is failing with:
```
10:22:33 [ERROR] [2020-06-15 08:22:33,740 +0000] - Resolve DockerEntity Exception Dangling meta character '*' near index 0
10:22:33 *.tar
10:22:33 ^
10:22:33 [DEBUG] [2020-06-15 08:22:33,743 +0000] - Resolve DockerEntity Exception {}
10:22:33 java.util.regex.PatternSyntaxException: Dangling meta character '*' near index 0
10:22:33 *.tar
10:22:33 ^
10:22:33 at java.base/java.util.regex.Pattern.error(Unknown Source)
10:22:33 at java.base/java.util.regex.Pattern.sequence(Unknown Source)
10:22:33 at java.base/java.util.regex.Pattern.expr(Unknown Source)
10:22:33 at java.base/java.util.regex.Pattern.compile(Unknown Source)
10:22:33 at java.base/java.util.regex.Pattern.<init>(Unknown Source)
10:22:33 at java.base/java.util.regex.Pattern.compile(Unknown Source)
10:22:33 at org.whitesource.utils.WssStringUtils.isMatchingPattern(WssStringUtils.java:49)
10:22:33 at org.whitesource.agent.dependency.resolver.docker.DockerResolver.filterTarImagesToScan(DockerResolver.java:296)
10:22:33 at org.whitesource.agent.dependency.resolver.docker.DockerResolver.resolveDockerEntities(DockerResolver.java:186)
10:22:33 at org.whitesource.fs.scanOrigins.DockerEntityScanOrigin.scan(DockerEntityScanOrigin.java:66)
10:22:33 at org.whitesource.fs.scanOrigins.ScanOrigin.runOriginScan(ScanOrigin.java:36)
10:22:33 at org.whitesource.fs.FileSystemAgent.createProjects(FileSystemAgent.java:132)
10:22:33 at org.whitesource.fs.Main.scanAndSend(Main.java:157)
10:22:33 at org.whitesource.fs.Main.main(Main.java:102)
10:22:33 [WARN] [2020-06-15 08:22:33,744 +0000] - Resolve DockerEntity Exception Dangling meta character '*' near index 0
10:22:33 *.tar
10:22:33 ^
```
* Switch docker.includes to slashy string
* Fix docker includes pattern in tests
Co-authored-by: Oliver Nocon <33484802+OliverNocon@users.noreply.github.com>
Co-authored-by: D070410 <srinikitha.kondreddy@sap.com>
