[JAVA-621] Ensuring each article has its own package

* Putting test classes directly under abstractclasses package (no need
for test subpackage, we're already in test sources)

* Removed unnecessary keyword package to just let superkeyword

* Renamed scope package to variableandmethodhiding

* Renamed package basicmethods into methods

* Putting test classes directly under methodoverloadingoverriding package (no need for test subpackage, we're already in test sources)

* Moved publicmodifier package under com.baeldung as it contains code from a separate article

* Moved privatemodifier under com.baeldung as it was under an unnecessary core package

* Renamed staticdemo package into staticmodifier (was more adequate with other modifiers articles)

* Putting test classes directly under defaultstaticinterfacemethods package (no need for test subpackage, we're already in test sources)

* Moved thiskeyword package to com.baeldung instead of under keywords package

core-java-modules/core-java-lang-oop-inheritance/src/main/java/com/baeldung/superkeyword/KeywordDemo.java

@@ -1,4 +1,4 @@
-package com.baeldung.keyword.superkeyword;
+package com.baeldung.superkeyword;
 
 /**
  * Created by Gebruiker on 5/14/2018.

core-java-modules/core-java-lang-oop-inheritance/src/main/java/com/baeldung/superkeyword/SuperBase.java

@@ -1,4 +1,4 @@
-package com.baeldung.keyword.superkeyword;
+package com.baeldung.superkeyword;
 
 /**
  * Created by Gebruiker on 5/14/2018.

core-java-modules/core-java-lang-oop-inheritance/src/main/java/com/baeldung/superkeyword/SuperSub.java

@@ -1,4 +1,4 @@
-package com.baeldung.keyword.superkeyword;
+package com.baeldung.superkeyword;
 
 /**
  * Created by Gebruiker on 5/15/2018.

core-java-modules/core-java-lang-oop-inheritance/src/main/java/com/baeldung/variableandmethodhiding/method/BaseMethodClass.java

@@ -1,4 +1,4 @@
-package com.baeldung.scope.method;
+package com.baeldung.variableandmethodhiding.method;
 
 
 public class BaseMethodClass {

core-java-modules/core-java-lang-oop-inheritance/src/main/java/com/baeldung/variableandmethodhiding/method/ChildMethodClass.java

@@ -1,4 +1,4 @@
-package com.baeldung.scope.method;
+package com.baeldung.variableandmethodhiding.method;
 
 
 public class ChildMethodClass extends BaseMethodClass {

core-java-modules/core-java-lang-oop-inheritance/src/main/java/com/baeldung/variableandmethodhiding/method/MethodHidingDemo.java

@@ -1,4 +1,4 @@
-package com.baeldung.scope.method;
+package com.baeldung.variableandmethodhiding.method;
 
 public class MethodHidingDemo {
 

core-java-modules/core-java-lang-oop-inheritance/src/main/java/com/baeldung/variableandmethodhiding/variable/ChildVariable.java

@@ -1,4 +1,4 @@
-package com.baeldung.scope.variable;
+package com.baeldung.variableandmethodhiding.variable;
 
 /**
  * Created by Gebruiker on 5/7/2018.

core-java-modules/core-java-lang-oop-inheritance/src/main/java/com/baeldung/variableandmethodhiding/variable/HideVariable.java

@@ -1,4 +1,4 @@
-package com.baeldung.scope.variable;
+package com.baeldung.variableandmethodhiding.variable;
 
 /**
  * Created by Gebruiker on 5/6/2018.

core-java-modules/core-java-lang-oop-inheritance/src/main/java/com/baeldung/variableandmethodhiding/variable/ParentVariable.java

@@ -1,4 +1,4 @@
-package com.baeldung.scope.variable;
+package com.baeldung.variableandmethodhiding.variable;
 
 /**
  * Created by Gebruiker on 5/7/2018.

core-java-modules/core-java-lang-oop-inheritance/src/main/java/com/baeldung/variableandmethodhiding/variable/VariableHidingDemo.java

@@ -1,4 +1,4 @@
-package com.baeldung.scope.variable;
+package com.baeldung.variableandmethodhiding.variable;
 
 /**
  * Created by Gebruiker on 5/6/2018.

core-java-modules/core-java-lang-oop-inheritance/src/test/java/com/baeldung/abstractclasses/LowercaseFileReaderUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.abstractclasses.test;
+package com.baeldung.abstractclasses;
 
 import com.baeldung.abstractclasses.filereaders.BaseFileReader;
 import com.baeldung.abstractclasses.filereaders.LowercaseFileReader;

core-java-modules/core-java-lang-oop-inheritance/src/test/java/com/baeldung/abstractclasses/UppercaseFileReaderUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.abstractclasses.test;
+package com.baeldung.abstractclasses;
 
 import com.baeldung.abstractclasses.filereaders.BaseFileReader;
 import com.baeldung.abstractclasses.filereaders.UppercaseFileReader;