Caste input to lowercase like we do for SearchBar (#404)

amundsen_application/static/js/components/SearchPage/SearchFilter/InputFilter/index.tsx

@@ -54,7 +54,7 @@ export class InputFilter extends React.Component<InputFilterProps, InputFilterSt
   };
 
   onInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
-    this.setState({ value: e.target.value })
+    this.setState({ value: e.target.value.toLowerCase() })
   };
 
   render = () => {

amundsen_application/static/js/components/SearchPage/SearchFilter/InputFilter/tests/index.spec.tsx

@@ -115,9 +115,10 @@ describe('InputFilter', () => {
     it('sets the value state to e.target.value', () => {
       setStateSpy.mockClear()
       const mockValue = 'mockValue';
+      const expectedValue = 'mockvalue'
       const mockEvent = { target: { value: mockValue }};
       wrapper.instance().onInputChange(mockEvent)
-      expect(setStateSpy).toHaveBeenCalledWith({ value: mockValue });
+      expect(setStateSpy).toHaveBeenCalledWith({ value: expectedValue });
     });
   });