Update clang-format configuration standard to C++17

The "Cpp11" alias is deprecated for Latest (a rolling standard).  For now,
stick to C++17.

Includes end-of-line whitespace removal.

Signed-off-by: Sean Robinson <sean.robinson@scottsdalecc.edu>

.clang-format

@@ -20,7 +20,7 @@ AlwaysBreakBeforeMultilineStrings: false
 AlwaysBreakTemplateDeclarations: false
 BinPackArguments: true
 BinPackParameters: true
-BraceWrapping:   
+BraceWrapping:
   AfterClass:      false
   AfterControlStatement: false
   AfterEnum:       false
@@ -55,12 +55,12 @@ DerivePointerAlignment: false
 DisableFormat:   false
 ExperimentalAutoDetectBinPacking: false
 FixNamespaceComments: true
-ForEachMacros:   
+ForEachMacros:
   - foreach
   - Q_FOREACH
   - BOOST_FOREACH
 IncludeBlocks:   Preserve
-IncludeCategories: 
+IncludeCategories:
   - Regex:           '^"(llvm|llvm-c|clang|clang-c)/'
     Priority:        2
   - Regex:           '^(<|"(gtest|gmock|isl|json)/)'
@@ -110,7 +110,7 @@ SpacesInContainerLiterals: true
 SpacesInCStyleCastParentheses: false
 SpacesInParentheses: false
 SpacesInSquareBrackets: false
-Standard:        Cpp11
+Standard:        c++17
 TabWidth:        8
 UseTab:          Never
 ...