Fix unit tests for IMEXP() function

The expected value were incorrect according to LibreOffice 5 and
wolframalpha.com.

Author: PowerKiKi

unitTests/Classes/src/Calculation/EngineeringTest.php

@@ -228,7 +228,6 @@ public function providerIMDIV()
 
     /**
      * @dataProvider providerIMEXP
-     * @group fail19
      */
     public function testIMEXP()
     {

unitTests/rawTestData/Calculation/Engineering/IMEXP.data

@@ -1,27 +1,27 @@
-"12.34+5.67j",		"187004.11273906-131589.323796073j"
-"-12.34E-5+6.78E9i",	"1.79747131321615E+308+1.79747131321615E+308i"
-"3.5+2.5i",		"-26.5302329126575+19.8186755366902i"
-"3.5+i",		"17.8923550531471+27.8656919720394i"
-"3.5",			"33.1154519586923"
-"3.5-i",		"17.8923550531471-27.8656919720394i"
-"3.5-2.5i",		"-26.5302329126575-19.8186755366902i"
-"1+2.5i",		"-2.17773413212721+1.62681595415671i"
-"1+i",			"1.46869393991589+2.28735528717884i"
-"1",			"2.71828182845905"
-"1-i",			"1.46869393991589-2.28735528717884i"
-"1-2.5i",		"-2.17773413212721-1.62681595415671i"
-"2.5i",			"-0.801143615546934+0.598472144103957i"
-"i",			"0.54030230586814+0.841470984807897i"
-"0",			"1"
-"-i",			"0.54030230586814-0.841470984807897i"
-"-2.5i",		"-0.801143615546934-0.598472144103957i"
-"-1+2.5i",		"-0.294724265585475+0.220165597929638i"
-"-1+i",			"0.198766110346413+0.309559875653112i"
-"-1",			"0.367879441171442"
-"-1-i",			"0.198766110346413-0.309559875653112i"
-"-1-2.5i",		"-0.294724265585475-0.220165597929638i"
-"-3.5+2.5i",		"-0.0241924409350133+0.0180722928030842i"
-"-3.5+i",		"0.016315715894263+0.025410221967i"
-"-3.5",			"0.0301973834223185"
-"-3.5-i",		"0.016315715894263-0.025410221967i"
-"-3.5-2.5i",		"-0.0241924409350133-0.0180722928030842i"
+"12.34+5.67j",		"187004.11273906-131589.323796073j"
+"-12.34E-5+6.78E9i",	"0.519482808316086+0.85433649244115i"
+"3.5+2.5i",		"-26.5302329126575+19.8186755366902i"
+"3.5+i",		"17.8923550531471+27.8656919720394i"
+"3.5",			"33.1154519586923"
+"3.5-i",		"17.8923550531471-27.8656919720394i"
+"3.5-2.5i",		"-26.5302329126575-19.8186755366902i"
+"1+2.5i",		"-2.17773413212721+1.62681595415671i"
+"1+i",			"1.46869393991589+2.28735528717884i"
+"1",			"2.71828182845905"
+"1-i",			"1.46869393991589-2.28735528717884i"
+"1-2.5i",		"-2.17773413212721-1.62681595415671i"
+"2.5i",			"-0.801143615546934+0.598472144103957i"
+"i",			"0.54030230586814+0.841470984807897i"
+"0",			"1"
+"-i",			"0.54030230586814-0.841470984807897i"
+"-2.5i",		"-0.801143615546934-0.598472144103957i"
+"-1+2.5i",		"-0.294724265585475+0.220165597929638i"
+"-1+i",			"0.198766110346413+0.309559875653112i"
+"-1",			"0.367879441171442"
+"-1-i",			"0.198766110346413-0.309559875653112i"
+"-1-2.5i",		"-0.294724265585475-0.220165597929638i"
+"-3.5+2.5i",		"-0.0241924409350133+0.0180722928030842i"
+"-3.5+i",		"0.016315715894263+0.025410221967i"
+"-3.5",			"0.0301973834223185"
+"-3.5-i",		"0.016315715894263-0.025410221967i"
+"-3.5-2.5i",		"-0.0241924409350133-0.0180722928030842i"