Rename test data folder according to the new test naming convention.

compiler/testData/loadJava/notNull/NotNullField.java

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+package test;
+
+import org.jetbrains.annotations.NotNull;
+
+public class NotNullField {
+    @NotNull
+    public String hi;
+}

compiler/testData/loadJava/notNull/NotNullField.kt

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+package test;
+
+public open class NotNullField() : java.lang.Object() {
+    public var hi: String = "";
+}

compiler/testData/loadJava/notNull/NotNullField.txt

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+namespace test
+
+public open class test.NotNullField : java.lang.Object {
+    public final /*constructor*/ fun <init>(): test.NotNullField
+    public final var hi: jet.String
+}

compiler/testData/loadJava/notNull/NotNullMethod.java

@@ -0,0 +1,8 @@
+package test;
+
+import org.jetbrains.annotations.NotNull;
+
+public class NotNullMethod {
+    @NotNull
+    public String hi() { return ""; }
+}

compiler/testData/loadJava/notNull/NotNullMethod.kt

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+package test
+
+public open class NotNullMethod() : java.lang.Object() {
+    public open fun hi(): String = ""
+}

compiler/testData/loadJava/notNull/NotNullMethod.txt

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+namespace test
+
+public open class test.NotNullMethod : java.lang.Object {
+    public final /*constructor*/ fun <init>(): test.NotNullMethod
+    public open fun hi(): jet.String
+}

compiler/testData/loadJava/notNull/NotNullParameter.java

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+package test;
+
+import org.jetbrains.annotations.NotNull;
+
+public class NotNullParameter {
+    public void hi(@NotNull String param) { }
+}

compiler/testData/loadJava/notNull/NotNullParameter.kt

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+package test
+
+public open class NotNullParameter() : java.lang.Object() {
+    public open fun hi(p0: String): Unit { }
+}

compiler/testData/loadJava/notNull/NotNullParameter.txt

@@ -0,0 +1,6 @@
+namespace test
+
+public open class test.NotNullParameter : java.lang.Object {
+    public final /*constructor*/ fun <init>(): test.NotNullParameter
+    public open fun hi(/*0*/ p0: jet.String): jet.Tuple0
+}