Always treat all sources as parts of the module being compiled

If a path to the module-info.java file is passed as an argument, we
should treat all other source files passed as arguments (either as
individual source files or inside a source directory) as members of that
module. Previously we treated other source files as members of the
unnamed module, and this resulted in incorrect errors when using a
member exported with a qualification from another named module, for
example

 #KT-18598 In Fixed

compiler/testData/javaModules/specifyPathToModuleInfoInArguments/moduleA/foo/Foo.java

@@ -0,0 +1,3 @@
+package foo;
+
+public class Foo {}

compiler/testData/javaModules/specifyPathToModuleInfoInArguments/moduleA/module-info.java

@@ -0,0 +1,3 @@
+module moduleA {
+    exports foo to moduleB;
+}

compiler/testData/javaModules/specifyPathToModuleInfoInArguments/moduleA/unexported/Unexported.java

@@ -0,0 +1,3 @@
+package unexported;
+
+public class Unexported {}

compiler/testData/javaModules/specifyPathToModuleInfoInArguments/moduleB.txt

@@ -0,0 +1,10 @@
+compiler/testData/javaModules/specifyPathToModuleInfoInArguments/moduleB/usage.kt:2:19: error: symbol is declared in module 'moduleA' which does not export package 'unexported'
+import unexported.Unexported
+                  ^
+compiler/testData/javaModules/specifyPathToModuleInfoInArguments/moduleB/usage.kt:9:5: error: symbol is declared in module 'moduleA' which does not export package 'unexported'
+    Unexported()
+    ^
+compiler/testData/javaModules/specifyPathToModuleInfoInArguments/moduleB/usage.kt:13:5: error: unresolved reference: Unrelated
+    Unrelated()
+    ^
+COMPILATION_ERROR

compiler/testData/javaModules/specifyPathToModuleInfoInArguments/moduleB/usage.kt

@@ -0,0 +1,14 @@
+import foo.Foo
+import unexported.Unexported
+
+fun usage() {
+    // Should be OK
+    Foo()
+
+    // Should be error
+    Unexported()
+
+    // Should be error: if we're passing the path to a particular module-info.java to the compiler,
+    // we should not treat its location as a root
+    Unrelated()
+}

compiler/testData/javaModules/specifyPathToModuleInfoInArguments/someOtherDirectoryWithTheActualModuleInfo/Unrelated.java

@@ -0,0 +1 @@
+public class Unrelated {}

compiler/testData/javaModules/specifyPathToModuleInfoInArguments/someOtherDirectoryWithTheActualModuleInfo/module-info.java

@@ -0,0 +1,3 @@
+module moduleB {
+    requires moduleA;
+}