moved test case to correct directory

src/components/table/__snapshots__/table_header.test.tsx.snap

@@ -12,13 +12,3 @@ Array [
   "children",
 ]
 `;
-
-exports[`EuiTableHeader renders td when children is null/undefined 1`] = `
-<thead
-  aria-label="aria-label"
-  class="testClass1 testClass2"
-  data-test-subj="test subject string"
->
-  <tr />
-</thead>
-`;

src/components/table/__snapshots__/table_header_cell.test.tsx.snap

@@ -68,6 +68,24 @@ exports[`renders EuiTableHeaderCell 1`] = `
 </th>
 `;
 
+exports[`renders td when children is null/undefined 1`] = `
+<td
+  aria-label="aria-label"
+  class="euiTableHeaderCell testClass1 testClass2"
+  data-test-subj="test subject string"
+  role="columnheader"
+  scope="col"
+>
+  <div
+    class="euiTableCellContent testClass1 testClass2"
+  >
+    <span
+      class="euiTableCellContent__text"
+    />
+  </div>
+</td>
+`;
+
 exports[`width and style accepts style attribute 1`] = `
 <th
   class="euiTableHeaderCell"

src/components/table/table_header.test.tsx

@@ -12,10 +12,4 @@ describe('EuiTableHeader', () => {
 
     expect(component).toMatchSnapshot();
   });
-
-  test('renders td when children is null/undefined', () => {
-    const component = render(<EuiTableHeader {...requiredProps} />);
-
-    expect(component).toMatchSnapshot();
-  });
 });

src/components/table/table_header_cell.test.tsx

@@ -14,6 +14,12 @@ test('renders EuiTableHeaderCell', () => {
   expect(render(component)).toMatchSnapshot();
 });
 
+test('renders td when children is null/undefined', () => {
+  const component = render(<EuiTableHeaderCell {...requiredProps} />);
+
+  expect(component).toMatchSnapshot();
+});
+
 describe('align', () => {
   test('defaults to left', () => {
     const component = <EuiTableHeaderCell />;