Mitigate path manipulation risks

Fortify - High - Require absolute paths and validate file / path inputs

- [x] [ConfigurationFileFilter](https://github.com/JanusGraph/janusgraph/blob/84ead7d/janusgraph-core/src/main/java/org/janusgraph/util/system/ConfigurationFileFilter.java#L49)
- [x] [ConfigurationFileFilter](https://github.com/JanusGraph/janusgraph/blob/84ead7d/janusgraph-core/src/main/java/org/janusgraph/util/system/ConfigurationFileFilter.java#L50)
- [x] [ConfigurationLint](https://github.com/JanusGraph/janusgraph/blob/84ead7d/janusgraph-core/src/main/java/org/janusgraph/util/system/ConfigurationLint.java#L58)
- [x] [ConfigurationPrinter](https://github.com/JanusGraph/janusgraph/blob/84ead7d/janusgraph-core/src/main/java/org/janusgraph/util/system/ConfigurationPrinter.java#L67)
- [x] [JanusGraphFactory](https://github.com/JanusGraph/janusgraph/blob/84ead7d/janusgraph-core/src/main/java/org/janusgraph/core/JanusGraphFactory.java#L187)
- [x] [JanusGraphFactory](https://github.com/JanusGraph/janusgraph/blob/84ead7d/janusgraph-core/src/main/java/org/janusgraph/core/JanusGraphFactory.java#L249)
- [x] [JanusGraphFactory](https://github.com/JanusGraph/janusgraph/blob/84ead7d/janusgraph-core/src/main/java/org/janusgraph/core/JanusGraphFactory.java#L291)
- [x] [JanusGraphFactory](https://github.com/JanusGraph/janusgraph/blob/84ead7d/janusgraph-core/src/main/java/org/janusgraph/core/JanusGraphFactory.java#L295)
- [ ] [AbstractDistCacheConfigurer 104](https://github.com/JanusGraph/janusgraph/blob/0b1b823/janusgraph-hadoop-parent/janusgraph-hadoop-core/src/main/java/org/janusgraph/hadoop/config/job/AbstractDistCacheConfigurer.java#L104)
- [ ] [AbstractDistCacheConfigurer 108](https://github.com/JanusGraph/janusgraph/blob/0b1b823/janusgraph-hadoop-parent/janusgraph-hadoop-core/src/main/java/org/janusgraph/hadoop/config/job/AbstractDistCacheConfigurer.java#L108)