This PR is related to BAEL-7174 (#15712)

* Update pom.xml

Add:        <module>core-java-regex-3</module>

* This commit is related to BAEL-7174

This commit aims to add a new module named "core-java-regex-3" and a new project named "passwordvalidation" to validate passwords using regex.

* Update PasswordValidationUsingRegexUnitTest.java

Change else-if to         assertTrue(matcher.matches());

core-java-modules/core-java-regex-3/pom.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>core-java-regex-3</artifactId>
+    <name>core-java-regex-3</name>
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>5.8.1</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+</project>