Use "= true" for TRUE() and "= false" for FALSE(). (#1633)

Closes #1627.

Author: mikereiche

src/main/java/org/springframework/data/couchbase/core/query/QueryCriteria.java

@@ -499,14 +499,14 @@ public QueryCriteria notIn(boolean ignoreCase, @Nullable Object... o) {
 	public QueryCriteria TRUE() { // true/false are reserved, use TRUE/FALSE
 		value = null;
 		operator = null;
-		format = "%1$s"; // field = 1$, operator = 2$, value=$3, $4, ...
+		format = "%1$s = true"; // field = 1$, operator = 2$, value=$3, $4, ...
 		return this;
 	}
 
 	public QueryCriteria FALSE() {
 		value = null;
-		operator = "NOT";
-		format = "not(%1$s)"; // field = 1$, operator = 2$, value=$3, $4, ...
+		operator = null;
+		format = "%1$s = false"; // field = 1$, operator = 2$, value=$3, $4, ...
 		return this;
 	}
 

src/test/java/org/springframework/data/couchbase/core/query/QueryCriteriaTests.java

@@ -261,13 +261,13 @@ void testNotIn() {
 	@Test
 	void testTrue() {
 		QueryCriteria c = where(i("name")).TRUE();
-		assertEquals("`name`", c.export());
+		assertEquals("`name` = true", c.export());
 	}
 
 	@Test
 	void testFalse() {
 		QueryCriteria c = where(i("name")).FALSE();
-		assertEquals("not(`name`)", c.export());
+		assertEquals("`name` = false", c.export());
 	}
 
 	@Test