Add test unit and pattern for generating logs

files/config.txt

files/known_log_lines.log

files/test.log

out/artifacts/grep_server_jar/grep.jar

pom.xml

src/main/java/META-INF/MANIFEST.MF

src/main/java/cs425/mp1/Client.java

src/main/java/cs425/mp1/ClientHandler.java

src/main/java/cs425/mp1/Grep.java

src/main/java/cs425/mp1/GrepThread.java

src/test/java/GrepTest.java

target/classes/cs425/mp1/Client.class

target/classes/cs425/mp1/ClientHandler.class

target/classes/cs425/mp1/Grep.class

target/classes/cs425/mp1/GrepThread.class

target/test-classes/GrepTest.class