Add testcases

src/main/java/cs425/mp1/GenLog.java

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

src/main/java/cs425/mp1/ResultInfo.java

src/main/java/cs425/mp1/Server.java

src/test/java/GrepTest.java

src/test/java/cs425/mp1/GrepTest.java

target/classes/cs425/mp1/Client.class

target/classes/cs425/mp1/ClientHandler.class

target/classes/cs425/mp1/Constant.class

target/classes/cs425/mp1/GenLog.class

target/classes/cs425/mp1/GrepThread.class

target/classes/cs425/mp1/JobThread.class

target/classes/cs425/mp1/ResultInfo.class

target/classes/cs425/mp1/Server.class

target/grep-1.0-SNAPSHOT.jar

target/maven-archiver/pom.properties

...-compiler-plugin/compile/default-compile/createdFiles.lst

...en-compiler-plugin/compile/default-compile/inputFiles.lst

...r-plugin/testCompile/default-testCompile/createdFiles.lst

...ler-plugin/testCompile/default-testCompile/inputFiles.lst