Replace String.replaceAll and String.replaceFirst with precompiled java.util.regex.Pattern to speed up String replacements

[stephanr]

This PR is a rebased version of #1639 which resolved the conflicts.
Original Text:

Proposal for replacing pattern compiles in degree for methods: String.replaceFirst and String.replaceAll

Closes #1639
Fixes #1633

References:

• String.replaceAll and String.replaceFirst are known to be slow due to Pattern compiles. Prefer Pattern.matches().replaceAll() #1633
• Fixes #1633: String.replaceAll and String.replaceFirst are known to be slow due to Pattern compiles. Prefer Pattern.matches().replaceAll() #1639

[tfr42]

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