Fix incorrect imports and add missing getNumberOfEnemies method in en… #3

Job	Run time
Section 11: TDD (3 projects)	19s
Section 09: Lambdas & Streams (7 projects)	24s
Section 08: Exception Handling (7 projects)	27s
Section 07: Collections (7 projects)	25s
Section 05: Arrays (1 project)	13s
Section 02: Conditionals (1 project)	10s
Section 10: Unit Testing (9 projects)	32s
Section 14: Spring Boot MVC (2 projects)	26s
Section 06: Java OOP (18 projects)	48s
Section 04: Methods (1 project)	16s
Section 12: Spring Boot Quick Start (1 project)	21s
Section 01: Java Fundamentals (2 projects)	16s
Section 03: Loops (1 project)	10s
Section 13: Spring Boot REST APIs (4 projects)	26s
	5m 13s

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