Change the EL to implement these new rules for handling Strings in
arithmetic operators:

A.3.5.1 Binary operators - A {+,-,*} B
 if A and B are null, - return 0
 if A or B is Float, Double, or a String containing ".", "e", or "E"
   coerce both A and B to Double and apply operator
 otherwise
   coerce both A and B to Long and apply operator
 if operator results in exception, error

A.3.5.2 Binary operator - A {/} B
 if A and B are null, - return 0
 otherwise coerce both A and B to Double and apply operator
 if operator results in exception (such as divide by 0), error

A.3.5.3 Binary operator - A {%} B
 if A and B are null, return 0
 if A or B is Float, Double, or a String containing ".", "e", or "E"
   coerce both A and B to Double and apply operator
 otherwise
   coerce both A and B to Long and apply operator
 if operator results in exception (such as divide by 0), error

A.3.5.4 Unary minus operator - -A
 if A is null, return 0
 if A is a String
   if A contains ".", "e", or "E"
     coerce to a Double and apply operator
   otherwise
     coerce to a Long and apply operator
 if operator results in exception, error
 if A is Byte,Short,Integer,Long,Float,Double
   retain type, apply operator
 if operator results in exception, error
 otherwise, error