[ADF-2415] PDF Viewer - open password protected pdf files (#3022)

* pdf password dialog

* PDF viewer onPassword test

* pdf password dialog

* PDF viewer onPassword test

* test

* test

* test

* test

* test

* test

* test

* fix password test

* travis improvements

lib/core/viewer/components/pdfViewer-password-dialog.html

@@ -0,0 +1,29 @@
+<div mat-dialog-title>
+    <mat-icon>lock</mat-icon>
+</div>
+
+<mat-dialog-content>
+    <form (submit)="submit()">
+        <mat-input-container class="adf-full-width">
+                <input matInput
+                type="password"
+                placeholder="{{ 'ADF_VIEWER.PDF_DIALOG.PLACEHOLDER' | translate }}"
+                [formControl]="passwordFormControl" />
+        </mat-input-container>
+
+        <mat-error *ngIf="isError()">{{ 'ADF_VIEWER.PDF_DIALOG.ERROR' | translate }}</mat-error>
+    </form>
+</mat-dialog-content>
+
+<mat-dialog-actions class="adf-dialog-buttons">
+    <span class="adf-fill-remaining-space"></span>
+
+    <button mat-button mat-dialog-close>{{ 'ADF_VIEWER.PDF_DIALOG.CLOSE' | translate }}</button>
+
+    <button mat-button
+        class="adf-dialog-action-button"
+        [disabled]="!isValid()"
+        (click)="submit()">
+        {{ 'ADF_VIEWER.PDF_DIALOG.SUBMIT' | translate }}
+    </button>
+</mat-dialog-actions>