Refactor classes to use commons collection 4 as collections 3 is flagged as vulnerable

[natechadwick]

Refactor the following classes to use commons collections 4. Update dependency reference in pom to use commons collection4 instead of commons collections.

• modules/utils/src/test/java/com/percussion/util/FunctionalUtilsTest.java
• modules/utils/src/test/java/com/percussion/utils/PSItemIteratorTest.java
• modules/utils/src/main/java/com/percussion/utils/collections/PSMultiMapIterator.java
• modules/utils/src/test/java/com/percussion/utils/collections/PSMultiMapIterTest.java
• modules/utils/src/main/java/com/percussion/utils/jsr170/PSItemIterator.java
• modules/utils/src/main/java/com/percussion/utils/jsr170/PSNamePatternFilter.java
• modules/utils/src/main/java/com/percussion/utils/jsr170/PSNodeIterator.java

[natechadwick]

@ramdev1980 This is future - please put on hold until 8.1.3 is released.