MODE-2317 Updated the JsonReader to support regular character sequences, even if they begin with \u.

Conflicts:
	modeshape-schematic/src/test/java/org/infinispan/schematic/internal/document/JsonReaderTest.java
Merge pull request #1263 from hchiorean/MODE-2317

MODE-2317 Updated the JsonReader to support regular character sequences, even if they begin with \u.