Fix "Avoid throwing raw exception types"

[nbrugger-tgm]

Codacy detected an issue:

Message: Avoid throwing raw exception types.

Occurred on:

• Commit: 958d7bdee2d8b297f95f5da29080bbe6eb8b36b0
• File: src/main/java/com/niton/reactj/special/ReactiveList.java
• LineNum: 64
• Code: throw new Error("Expected methods not found in java.lang.List class",e);

Currently on:

• Commit: e61899c0e5c4536b6edb8ecf1980ae250cac4183
• File: src/main/java/com/niton/reactj/special/ReactiveList.java
• LineNum: 64