Predefined ANSI styles (Style=Spock, Style=Kirk) never apply

[ramanathan1504]

%xEx{ansi(Style=Spock)} and %xEx{ansi(Style=Kirk)} render with no styling at all.

Two defects in JAnsiTextRenderer:

1. JAnsiTextRenderer.java:217 — the predefined map is merged with map.putAll(predefinedMap),
   which keeps its keys as written (Name, Message, …), but lookup at line 247 is
   styleMap.get(toRootUpperCase(styleName)), so nothing ever matches. The name falls through to
   AnsiEscape.createSequence("Name"), which warns and returns an empty ESC[m.
2. JAnsiTextRenderer.java:97-101 — entry() builds CSI + code + code with no ; separator
   and no m suffix, so entry("Name", BG_RED, WHITE) yields ESC[4137. merge() at line 263
   then strips a trailing m that was never appended. Masked today by (1).

Reproduced against 2.x HEAD, new JAnsiTextRenderer(new String[] {"ansi", "Style=Spock"}, emptyMap()):

  Name          -> ESC[m XYZ ESC[m                                                                                                                                          
  Name,Message  -> ESC[;m XYZ ESC[m                                                                                                                                         
  bg_red,white  -> ESC[41;37m XYZ ESC[m   (user-supplied styles are fine)                                                                                                   

main has both defects in the renamed AnsiTextRenderer (lines 192, 96-99, 238).

Found while reviewing #4184; unrelated to that PR.