fix(ui5-information): fix component visual (#1498)

- fix type="Information" appearance, by setting the correct varialbes, previously the "neutral" semantic variables has been used
- fix the icons colors in all types, they used to remain grey (their default color), instead of being in the respective semantic color according to the component type

FIXES: #1496

packages/main/src/MessageStrip.hbs

@@ -5,11 +5,11 @@
 	aria-labelledby="{{_id}}">
 
 	{{#unless noIcon}}
-        <div  class="ui5-messagestrip-icon">
+        <div class="ui5-messagestrip-icon-wrapper">
             {{#if iconProvided}}
                 <slot name="icon"></slot>
             {{else}}
-                <ui5-icon name="{{standardIconName}}"></ui5-icon>
+                <ui5-icon name="{{standardIconName}}" class="ui5-messagestrip-icon"></ui5-icon>
             {{/if}}
         </div>
 	{{/unless}}

packages/main/src/themes/MessageStrip.css

@@ -18,7 +18,7 @@
 	position: relative;
 }
 
-.ui5-messagestrip-root .ui5-messagestrip-icon {
+.ui5-messagestrip-root .ui5-messagestrip-icon-wrapper {
 	position: absolute;
 	top: var(--_ui5_messagestrip_icon_top);
 	left: 0.75rem;
@@ -45,13 +45,13 @@
 }
 
 .ui5-messagestrip--info {
-	background-color: var(--sapNeutralBackground);
-	border-color: var(--sapNeutralColor);
+	background-color: var(--sapInformationBackground);
+	border-color: var(--sapInformationBorderColor);
 	color: var(--sapTextColor);
 }
 
 .ui5-messagestrip--info .ui5-messagestrip-icon {
-	color: var(--sapNeutralElementColor);
+	color: var(--sapInformativeElementColor);
 }
 
 .ui5-messagestrip--positive {